Landar, I hadn't heard of Nokians either until I moved to serious snow country. Those Finnish--they know how to make snow tires, considering their habitat and needs. Of course we here in the states know nothing about snow driving compared to them.
There is one thing I have noticed--they seem to be just a minor step below a truly dedicated snow tire in terms of ice traction. If the gap between an all-season and a dedicated 1-season snow tire were 3 vs. 10, I would put the WRs at an 8 or 9. But then again, if ice traction were a priority, you'd get studded snows anyway.
Overall, I don't think you'll be disappointed, considering the convenience.