Very good all round tire

Very solid tire, value for money is hard to beat at the moment.
Tire performs very well, especially amazingly on wet roads, despite the 255 width there is no slipping, aquaplaning or spinning tires. I switched straight from Fulda Sport summer tires to this model. Comfort and actually driving behavior are better than its predecessor. I couldn't believe it myself.
At first the tires were extremely loud, so I even considered complaining. I like that the tires simply tend to sawtooth.
Luckily the noise disappeared completely after about 2000km.
In winter the tire behaves like an average winter tire. Not special but not bad either.

Substituting the Michelin Crossclimate2 previously mounted, the benefits are very clear: less noise, more grip, super balanced, less rolling resistance.
The question marks are now the behavior in snow and ice, and the duration.

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I bought these tires after having driven with Michelin CrossClimate on my TM3 LR AWD. I drove 85,000 km on the Michelin, and it was a great tire. These Hankook tires were ranked first alongside the Michelin CrossClimate 2, where Michelin performed better in snow than in rain (where Hankook was best). And since there is more rain than snow in Denmark, this seemed like the obvious choice.

It turned out I was terribly wrong. They are not very good tires. They are decent in dry conditions, but in wet and snowy conditions, they are terrible. It feels like there is no grip or feedback. We took them on a ski trip, and there were multiple moments when the car felt like it was slipping for no reason. In the rain, when accelerating hard, they struggle to maintain traction. This was NEVER a problem with Michelin.

I have now driven approximately 35,000 km on them, and they will need to be replaced within the next 5,000–10,000 km. Do not buy these Hankook tires unless you want to gamble with your safety!

I had the car for 5 years 16k miles ( 26k km ) and temperatures from -7° to 39°c, I've loved this tire.
Totally reccomend it.

The tires are supremely competent on paper and in a dry, analytical manner it ticks the boxes for a good grippy compromise from cold to hot weather. Yet in practice I find these tires really awful. They bring out the worst handling traits on my car (2012 Toyota Yaris) that I never experienced with three other different types of tires I had on the very same car (both summer and winter tires).

My main problem with the Kinergy 4S2 tires is that there is too much movement in them. Torsional flex is generous and lateral movement is extreme. As a result the car is really sensitive to tramlining and following ruts in the road. The car is extremely nervous on the motorway with side wind and gusts. I am sensitive to motion sickness, but I never imagined I would become motion sick behind the wheel going in a straight line. When you demand the sideways grip from the tire (sporty cornering, swerve, evade obstacles) there is so much flex that it will feel like the rear wants to step out. You may get used to it (I have) but it does not inspire confidence.

I have tried if tire pressure has any positive effect on the tires' stiffness, but the effect is rather limited. The standard 2.3 bar for the car was increased to 2.7 bar without a major improvement in responsiveness / feedback. Unfortunately any higher pressures seriously compromises comfort over bumps, which would take away one of the very few good traits of this tire.

Fuel mileage is another factor that has disappointed me: I have a 4.5% increase in fuel consumption compared to my previous WINTER tires (the comparison includes a compensation for differences in the tire radius between the tires and consumption monitoring over at least 10 tank stops in the same season with the same driver and driving style). With the lifespan of my previous tires (60,000km) I can expect to pay for an additional 137 liters of fuel. With current fuel prices that's almost enough to fund a full second set of tires. Enough reason for me to take my losses and start looking for a new set of tires that I do like.

Very good tyre with plenty of grip. Managed to grab a set of 4 at a good price. Covered over 15,000 miles before parting with the car and they still had over 4mm of tread remaining. Only downside was that they produced a bit more road noise and slightly worse fuel economy compared to the previously fitted tyres. However, a small price to pay for much better grip in the typical wet and cold British weather.

I drove a Ford Fusion 40 miles to get from my small town of country roads all the way to the airport in 3-5 inches of fresh snow most of the way and I was complete shocked how well these ate the miles of snow like I never expected. Not only that, but they gave confidence at pretty high speeds I probably shouldn't have been driving. The area I drove that was deeper 5ish inches I thought for sure was likely going to get me stuck when I had to come to a full stop, but no, they did great and we made our flight.

I was surprised that such a well-priced all-season tyre could be so good in the wet. Much better in the wet (traction, braking and handling) than my summer Toyo TR1 tyre and nearly as good in the dry. We don't get much snow here (Hungary), ice and rain are more common, especially the latter. Hence I opted for all-season for winter driving BUT they work well enough in snow, which also surprised me. I was tempted to use them all year around but for the extreme summer heat. Coming from down-under, I was unprepared for the continental climate extremes. I obviously need better summer tyres but I will be getting new Hankook 4S2s when the time comes to replace them. I've done about 15,000km so far. I am about to bolt the winter rims back on this weekend (late October) and I still have 5-6mm of tread left. I'm looking forward to improved grip in the wet, especially.

Extremely well performing tire in all conditions, if you don't push it too hard (especially when the temperatures are in the 30s). They're a very good fit for my Hybrid Jazz, that I drive in Swiss weather all year long; lots of wet and cold don't make the tires feel unsafe in any circumstance; even snow performance is acceptable. The noise levels are also quite good, and the wear is surprisingly low without much of an ageing effect of the rubber. I am now at 38000 miles and there is still quite a lot of tread available. Considering the price of this tire is at least 30% lower than the premium brands (Bridgestone, Michelin...) and that for my car Pirelli and Continental are not available, I am finding it very hard to buy another tire for my car! Exceptional tire for the price.

Good tyres in wet, dry, good in a light snow, cornering. Poor fuel economy, when I used in summer F rated winter tyre, they used 0.8-1l less when Hankook C rated tyres. I was checking it carefully driving same roads, same conditions, same speed, traffic and etc. Not so sure for the wear yet. One of the best tyres in autumn, or rainy spring.

Incredibly surprised for being a four-season tyre, which I was always kind of against, but since they were on the car when I got it and were still pretty good (4y/o but plenty of tread, the car wasn't driven much in that period) I decided to keep them and test them. I recently started working in the testing dept. of a big tyre brand in Italy so that was a good chance to acknowledge me more to my job.
I 10 months of ownership I drove 15.000 km in my '99 BMW E39 528i on the Hankook's and the general feedback of the tire-car package is very positive. I already knew the E39, having had another one right before this one, so I knew the level of comfort this car can bring when driven in its favourite habitat: the highway. Well, the Kinergy 4S2 just enhanced this, it's like the cherry on top. I normally drive at 2.3 bar (33 psi - the highest pressure allowed) and my usage is 90% highway, 10% flowy, medium-fast road, so the perfect environment for the car. On the highway, the sound coming from the tire, if not completely absent, can be considered almost nonexistent when mixed with some wind noise and the good deadening equipment of the car (radio turned off). Rolling resistance is also pretty low, allowing me a 12km/l (yes, not crazy low but it's a 1500 kg car with a pretty big engine). Despite riding on the highest pressure allowed, the tire seems to absorb any imperfection of the road in a very gentle way, thanks to it's high, soft sidewall. At 33 psi you can still see a pronounced curvature on the wall. Cornering on mildly fast roads is happily taken by the tyre, giving a very good balanced behaviour, not oversteery, not understeery, just steady. Very fun.
In June I took the car to the Nurburgring and drove 4 laps, let's say as spirited as I could with traction controll off.
I lowered the pressure to 1.6 bar (23 psi). It was maybe a little too low for the weight of the car. Here is where you could really see and feel the softness of the sidewall: it bended lots on the tighter corners, the car was rolling.. but it stayed. Again, no oversteer if not asked, and no understeer at all. You felt the body rolling, but as soon as it reached the maximum, after that fraction of a second, it stayed there and let the tyres do the job, clean and precise in turning the car. Always keep in mind we're talking 4-season tyres, obviously.
I still never got to drive them on snow or ice, and very little in the rain, where I always stay cautious. Only once, it was raining and I was in a tunnel. Towards the end of a pretty long tunnel, to be precise, to both the asphalt and the tyres were pretty dry already. On a medium right hander, one you can easily take in 5th gear with slight braking, the car just lost the back. I wasn't racing, but it was night and I was driving back home in the empty road. that's when you go a little over the speed limit, but not "fast", to give you an idea. Really, I was just going with the flow, enjoying some good driving but nothing crazy. If I did't have the controls on, I would've crashed. that was the only time these tires really let me down for a second.
Overall, the feedback is very positive for an all-around tire, I'm happy with it. It's something I wouldn't have personally chosen and I will later switch to 18's and more performance-oriented tyres, but I will keep a good memory of the Hankook's. Will probably buy another set of them in 16" as a winter tire as we don't get any more snow here. Hope this was helpful for someone!

Fitted tyres based off reviews form this site. They exceeded my expectations, so much so I have also fitted them to my partner car also. Excellent ware (39,000km and still 1mm to ware bar), good dependable wet and dry handling, very good in colder temperature, Great in the snow (the little we get in Ireland)
Would recommend to anybody

Got these for the winter season as I live in a country with mild winters. I was reluctant to get all seasons initially, but after some woeful experiences with the BMW-homologated Pirelli Snowcontrol 3 that came with the car, I figured it probably can't get any worse anyway.
These tyres are some of the most decent, uncompromising I've ever had - they do exactly what you expect them to, regardless of conditions. I've driven them up to 210 km/h on the Autobahn and felt just as safe as with summer tyres, drove them in snow and felt like I had more grip than the previous Pirelli winters and their performance in the wet is more than fine. They're a bit soft and squealy on the limit, but that's something to be expected of tyres that bridge the gap between winter and summer tyres. You can still have fun with them if you want to, but I haven't felt unsafe driving with them at any point.
The only other downside would be a certain humming at around 70-90 km/h, akin to what winter tyres would do at around the same speed. They're quieter than winters overall, though. Would most likely buy them again, especially considering how good they are in terms of value for money.

For an idea of the climate they're operating in, I live in Dublin, Ireland so plenty of rain and mild temperatures for most of the year with some low temperatures and snow/ice around January/February.

I previously had 205/55R16 4S2s fitted to a mk2 1.4 Focus, and absolutely loved them in all weathers including ice and snow. When it came time to replace the front tyres on my Mk3.5 1.5TDCi Focus, I decided to upsize from the 16s that also came on the car to 17x7J wheels all round, as I didn't like the sidewall flex on the 16s.
I went with 225/45R17s rather than Ford's recommended 215/50R17s, as the 215s were much harder to come by and were more expensive. They have absolutely transformed the car compared to the 16" Davanti DX390s that came with it. Even with the slightly wider than recommended fitment, the turn in is almost instant, with very little hesitation. When they begin to let go they do so gradually, without any judder, and they're exceptionally easy to reel back in, wet or dry. They inspire a lot of confidence that when things go wrong, it won't be catastrophic and will guide you back onto line once a bit of speed has bled off.
Compared to the Davantis they're replacing, road noise is much reduced, and even despite the much smaller sidewall, comfort hasn't been affected too negatively. I've noticed much less road noise at all speeds, and the car settles down much more quickly over bumps. There's certainly more road feel through the seat and wheel, but I wouldn't class it as less comfortable since it doesn't tend to wallow the way it did before.
I've also noticed that, due to the stiffer sidewall, it doesn't scrape the deflectors in front of the front wheels over speed ramps anywhere near as easily as it did previously, but this might be more to do with the size change than the tyre change.
If things carry on as they are, I fully intend to keep these tyres and based off previous experience, I would recommend them to anyone who wants their run-of-the-mill car to perform well in all weathers!