I bought and installed these tires in February. I have now run them long enough to provide a fair review. My overall assessment... absolutely awesome! I purchased them from Performance Tire. They provided excellent service. I have no hesitation in recommending them and I will use them again. I paid $198 per tire when I bought them.
As to the tires, they perform waaay better than the potenza's in every metric. In dry conditions, they have better launch traction (and less w/hop), better lateral cornering grip, and less road noise. In the rain... they get even better. This is the best rain tire I have ever driven on.
The tire has a very aggressive tread design. It is symmetrical but not directional so it looks sorta odd in an exotic way. Some may not like the look. I happen to like it. They have a wide rim protector that extends just past the rim on my stock 19" wheels. I had them mounted and road force balanced. The measurements for the four wheels was 1 lb, two at 3 lbs and one at 8 lbs. I questioned the 8 lb tire and the tech told me any tire in single digits was outstanding. He said he had never had a set of off the shelf street tires this good.
Overall, an outstanding tire.