Compared to the other Dunlop, Bridgestone, Hankook and current Continental ExtremeWinterContacts I've used on various RWD sports cars, these are without a doubt the worst winter tire I've purchased in the last 15 years.
They're completely adequate in snow and I don't have any complaints. I might go so far as to call them pretty darn good.
The problem is that on cold (<40F), wet pavement they have no grip and are completely unpredictable. If you've driven a pure high-performance summer tire on cold wet pavement, these feel even less secure. Worse, once the car starts to slide, it really doesn't want to stop. In three weeks I've had more OH SPIT! moments than in my past 5 years of driving combined.
My Miata on these things makes my more-than-twice-as-powerful M3 on Continental ExtremeWinterContact tires feel like a Subaru. On wet pavement, it's gone from a car that can be tossed and caught ad infinitum to a total widow-maker that starts to squirm around even under normal driving.
In short: good in the snow, remarkably horrible in the wet. Better than an all-season, I'm sure, but there are MUCH better tires for the money.