First All Weather tire I've driven on. Used on a VW Jetta almost entirely for city driving.
You'll get maybe 28k miles out of them if you fail to rotate them, probably twice that if you rotate them properly. They are a great fun tire for a light car and provide plenty of traction year round in all weather conditions. They provide stable traction as long as you don't push your car too hard into severe understeer conditions or pretend you are driving an actual winter tire. If you've driven on winter tires previously they simply won't be as good but are infinitely better than all season tires on a fwd car in the snow.
Once the circumferential grooves are gone your ice/snow directional traction reduces significantly and you'll likely notice road noise increases significantly by this point as well.
Don't think I'd use these on an SUV - but maybe the 4S2 X is better since it is desired for SUVs?
Much better for winter driving than the two all(3)-season Continental ContiTouring and Pirelli P4s I've driven on previously.