Drove these tyres last summer. I got these symmetric Greenmax HP010 tyres due to an confusing website from which i thought i was ordering asymmetric Greenmax UHP -tyres. These two are completely different style of tyres, and not to be confused together. This HP010 is comfortable touring style tyre, as opposed to UHP which is supposed to be the sporty one. HP010 is not a "High Performance tyre" as it is described in "Tyre reviews" description of the tyre.
Anyways, this fact doesn't make this tire a bad one, not at all. It is a very comfortable and quiet, plain and symmetric passenger car tyre. Although it is not a crisp handling sporty tyre, it's straight line keeping ability is good and steering response is sufficient to daily drive and occasional country road trips for fun. Steering response is rather soft, but still logical and stiffening towards ends without surprising behaviour.
As to grip in wet roads, even relatively cold ones (Finland), i could not get these tyres to slip on wet asphalt, even as i was deliberately punishing the car and the tyres in winding country roads. Of course they will slip, but at that point the speed is mindless anyway. Chinese are catching up in this area, obviously.
These tyres could perhaps be best described as "Old Man Style" -tyres, without negative connoitations. They are comfortable (civilized even on rotten roads full of potholes around here), quiet and dirt cheap, and seem to be lasting rather well by their tread. Also due to being a symmetric tyre, this ensures easy seasonal cross-rotations.