We don't normally see a lot of snow where I live, but since the Z is my daily driver, I put Blizzak LM-60's on back in December and couldn't be more pleased.
I've driven it in snow a couple of times since then. The first time was a couple of inches of snow on untreated, unplowed interstate. Driving sensibly, I had no problems.
Prior to the Z, I've always had RWD sports cars with all-season tires and the Z with the Blizzaks is by far the best traction and handling I've ever had on snow.