I know nothing about these specific tires, just speaking of winter tires in general....

I would not recommend driving on winter tires year round for several reasons. First and foremost - performance; you will hate those tires everytime you try to take a sharp turn. They will wear at a rapid rate in the higher temperatures as well. And the ride will probably be a little more forgiving since the sidewall is not as rigid as a high performance summer tire, but again, I do not think you will like the louder, more sedated feel of the car.

IMO.