I have a modified Taurus SHO putting down about 405hp and 450tq, and these tires perform great in all conditions. I don't consider these all-seasons, i consider then 4 season tires.
Good in all conditions. I swapped out my Goodyear Eagle F1 summer tires, and expected a drop off in handling, but I seriously can't tell.
They are also extremely loud when you try to break traction, which means there is some serious grip from these tires. They are very quiet and smooth on highway cruising, and high speed stability is impeccable. No reason to keep summer tires around. Just mount these and you're done.
Oh, and the tread life is also amazing. I can barely measure any wear after 7000 miles. And my car is about 4400lbs.