I've had these Pirellis on my 335xi for a bit over a month now and I've out almost 3,500 miles on them since, in a number of conditions.
In the last week especially, I've experienced just about everything you could throw at these and I'd frankly rate them as bulletproof.
This last week I road tripped to VA from CT to see my family (800 mile round trip) with warm temps at times (50s) and cold (10s). I had light snow & slush, dry roads and cold and the tires just get better the folder it gets. I then drove to VT yesterday to go snowboarding (350 miles round trip) and returned in a heavy winter storm (4+ inches of heavy snow). Roads were NOT being plowed in any state (VT, MA, CT) and tires handled great. Lots of confidence going up and down hills, great braking, ABS/TC never kicked in once and never felt any slip. And most of the drive through MA and CT was like driving through Donner Pass in CA when it's chains only (which I've done a few times - lots of packed snow, can't see lanes, chains or AWD/4WD with snows required) and the 210s were solid. Able to easily do 40-50, visibility & traffic permitting (probably faster but girlfriend didn't like that).
My point of comparison for these is the Continental ContiPro RFTs in OEM size that were the original tires on my vehicle. They rode really hard and were quite loud. The 210s ride a bit softer, and are quieter (for an RFT - not as quiet as non-RFTs). Worlds better in snow handling. Contis were a bit better in dry/warm than 210s, which can feel a bit mushy in corners at speed, but the more miles I get on them, the more its like riding on rails.
If you have an AWD car and live where there's snow, or drive to where there's snow, step up and get yourself some snows - best decision I ever made.