I have Eagle GT A/S tires in 245/40/18 on my A-Spec suspension Acura TL. I'm very satisfied - Excellent wet and dry handling and traction. Snow/ice traction is okay but nothing compared to true snow tires I rock during winter. Road noise is average - nothing disturbing but you definitely hear a hum which is expected from this tire category. They look amazing compared to other All Seasons like the DWS or RE960's because they're square between sidewall and the tread like High Performance Summer tires instead of rounded. They offer an additional 1/2 to 3/4 wider tread contact surface than Potenza RE960's in the same size. The GT's also have a decent rim protector for light rubs against a curb. Treadwear is good so far as well assuming you rotate and keep your tire pressure within spec. Currently have 17,500 miles with 6/32 tread left with 70% highway/30% city. Roadnoise has not increase. Ride comfort is on the firm side compared to the Grand Touring rated Michelin MXV4's that came with the car, but this is why the Ultra high performance rated GT's handle well. If I increase the tire pressure to 38psi, the ride gets a little too harsh for crappy Seattle streets, so I generally leave it 35-36psi.
I have a set of 245/40/18 Potenza RE960's ready to go in my garage for when I replace the Eagle GT's, but will be sad to see the Eagle GT's sporty summer tire like sidewall design go away. I know RE960's and DWS will probably do everything a little better minus looks, but for the low price, the Eagle GT has never done me wrong and looks like they'll get me to roughly 40,000 miles on my 3600lb TL.
Overall, the Eagle GT's are not quite as sticky as the previous F1 A/S tires but not far off either. Quality has been significantly improved in Eagle GT A/S compared to my noisy steering wheel vibrating Eagle F1 A/S tires where 3 out of 4 of my F1 A/S's had an inability to be Roadforce balanced under 28lbs even after sending back one to be replaced which had 48lbs Roadforce.