Very good dry grip, can feel the car starting to lose grip if going round a roundabout a bit on the keen side in the wet. Got 20k miles out of a front pair, worn down to 2.5mm before changing on my mk5 fiesta. Impressed with the Firestones, just replaced with TZ300a's.
They're already 7 years old, only some 50 000 kilometers with them and they're almos new. I don't own a very powerful car, but on the corners I have no stress even if they're on 15". Very good grip on the wet. The fuel consumption raised a bit from some 195 65 15 Winter Michelins. Not very noisy, but the tyre finishing is not the very best though - lots of rubber residue. Very happy with them, and if I wasn't looking for 17s, I would consider to buy those again.
Much better than Michelin Energy XV1 put by factory. Good grip in all weather conditions and driving situations (city, mountain road and highway). Its side it's a bit soft so the steering is not so immediate, but 0.3 bars more can solve the problem (on my Corolla). It's a bit noisy on highway, from 110 km/h, more or less. Noticeable reduction of fuel consumption. Overall, I am quite satisfied.