The make a great snow tire. I am on my 3rd set of Nokian snow tires, and I love them. I have had had 3 other cheaper brand snow tires, their is a night and day difference. Suposedly Nokians allseason tires are pretty good in the snow (as oposed to most All season which are barely adequate)
For most Turbo Regals, they obviously aren't the right tire for them. If for some odd reason you were to daily drive TR in a snow climate, I would recommend them. I actually recommend Nokians to all of my friends, but most of them balk at the price. The few I have converted love them as well. If it saves me an accident its worth the extra price to me.