TL;DR Fulda Kristall Montero 3 is better than Sava Eskimo S3+ and Tigar/Taurus/Kormoran winter tyres.
It is solid tyre in every aspekt. It's good in dry braking and cornering. It's good in wet braking. Fulda had never let me down nor put me in risky situation.
During the rain, at 80-90 km/h, I had never experienced aquaplaning.
It's very good in snow, but Sava is better in this aspekt.
In cold weather it's good tyre, above 10°C is mediocre, but drivable. Above 15°C you should switch back to summer tyres (because of COVID-19, I did change it in late March).
I would rather drive summer tyres (e.g. my Nexen N'blue HD plus @ 205/55/16) in the range of temperatures 5-7°C at dry road, and above 7°C in wet, than this winter tyre.
Tyre started around 9-8 mm, and after 5 months of drive finished around 7-8 mm.
To conclude, I would recommend Fulda tyre if you live in some mitteleuropean city with lots of rain and dry periods, and of course snowy days. If you experience more snow, I would go for Sava Eskimo S3+. Fulda Kristall Montero 3 is better than Sava tyre in the wet, dry, but just less good in snow.
Additional information: 185/65/15 Fulda Kristall Montero is "Made in France", Sava Kristall Montero 3 is "Made in Poland", and Tigar/Taurus/Kormoran is "Made in Serbia".