I thought an update was in order:
Brand & Name: Goodyear Eagle GT's
Tire Type: Ultra High Performance All-Season
Speed Rating/Service Desciption and UTQG: 87V 440 A A
Size 205/50/16
Price: $87.00 per Tirerack.com, $100 for Discount Tire
Vehicle Installed: 2007 MINI Cooper, 1.6L
Miles Driven: 12,000
Conditions: Mixed city and highway, long road trips, wet/dry, no snow/ice
Review: At first I really enjoyed these tires, they offered decent grip and were quite-ish. I fell out of love with them though. He's a slight revised version of what I wrote on TireRack.com about them:
These tires are mediocre at best. In the dry they provide decent grip, but not to the level many reviews claimed. If you read that these tires are superior to summer-only tires in the dry, take it with a grain of salt. The GT's wet traction is pretty appalling too, especially with standing water. Looking at the treads I would think it'd hydroplaning resistance would be pretty good, but one again I made an incorrect assumption.
Probably the worse thing about this tire though is its tread life. I'll admit, I do a mix of spirited and normal driving, but with a big lean towards average commuting. I don't understand how occasional spirited driving can eat the tread like that and offer such poor grip. At 12,000 miles I'm already lower than 50% tread life, that was worse then the OEM runflats.
The quality of the tires isn't very good either in my opinion. They constantly loose air pressure and I've had them checked for punctures as well as had my rims checked to make sure they weren't bent. I don't know why these tire constantly looses pressure, and no one seems to have a good answer. I used to be a huge fan of Goodyear tires, however the GT's have gave me a negative perception of the company unfortunately.
One thing I am impressed with is the ride comfort and noise over the OEM runflats. On long motorway journeys they are smooth and quite. This does help with the long road trips I do from time to time. It allows me to be less fatigued, which is always a good thing.
In short, if you do any spirited driving or drive even a remotely sporty car at all I would avoid these tires like the plague. They might be good for average around town driving but with a MINI Cooper, they just don't seem to fit right.