It depends on what you are looking for in a tire...
Hands down, they are one of the stickiest tires you can put on your car short of race rubber. Excellent dry grip. Suprisingly good in the rain, though I have heard they are a terror in the snow. They are also rather noisy as tires go. 10 - 15K miles per set. The price is right. *shrug* Depends on where your priorities are, really.
