The potenza re950 in 16/225/50 with about 8-10k miles worked very good in 3+ inches of snow last Friday in snow. I passed at least 2 suv's that had spun out (one was a honda crv? if that counts).
I have not had them in ice/slush but on solid snow they were ok, but not great.
But then i live in phily so we only get snow 3 or 4 times a year (it's almost sub-tropic)