Used these from November 2014 to April 2015. From memory only a very light dusting of snow on two days here in Somerset. Standard wheel/tyre size is 235/40/19.
These are the first cold weather tyres that I have used, and I did a bit of reading before deciding to buy them. Cost/performance wise, I think they are excellent.
These felt softer and more comfortable compared to the standard 19" Bridgestone 050 tyres on this car, and are noticeably quieter.
As they are softer, they are not as precise/responsive when cornering when compared to the Bridgestones, but that is to be expected due to the size/tyre difference. After getting used to this it corners fine and with plenty of grip in the dry and wet. I do tend to drive round roundabouts a bit quick, so they did understeer a little on a few occasions, but nothing that was not controllable. Generally feedback was good.
They also performed well on muddy forest tracks when I went on Wales Rally GB. I would say better traction than summer tyres and less wheelspin.
Rolling resistance is less with these compared to the summer 19's, I notice it anyway, and fuel consumption didn't drop considering all the electrics that are on in the winter months.
Can't really comment on its performance in snow, as we didn't really get any in my part of Somerset, though they seemed good on icey roads.
Tyre depths after 6 months, 6000 miles are as follows: n/s/f = 5mm, o/s/f = 5.5mm, both rears 7mm (n/s/r marginally lower). I'm more than happy with this as I normally go through a pair of front tyres in 12K-15K miles in my old car (ST24 with soft tyres).
I'll definitely buy these again when it comes round to it, but that will be 2 years away and tyres will have change by then, so would have to read up again. Certainly recommended for anyone looking now.