I'm finding the goodyear ice grips the most unstable and slippy tires I've ever had on my 318i. This is on dry and wet. I've never had tires screech before on turns and braking but do with the ice grips, and I've had 2 sets of blizzaks in the past.
I tried to write goodyear about this on their email contact us page, but the page submit is completely broken with an incorrect url on submit.
Anyway, what do you think of these tires on ice, their purported primary venue?