Have had these on my FK2 Civic Type R for 7500km now, with 6500 of those km-s coming from a European road trip to the Nürburgring, on German autobahns and through rainy Italian mountain passes. The tire is great, it really is. I measured the tread depth at the beginning of the trip and came up with 7mm (essentially brand new). At the end of the trip, the front tires were at 5mm and rear tires at 6mm. At the Nürburgring, it took 6 (120km) hard driven dry laps to reduce the tread depth about 0.8-0.9mm (front tires). For those who read reviews saying that these tires don't last or that they wear fast on track, don't be discouraged. I have no idea how those people drive their cars, but less than 1mm of tread lost in 6 fast laps of the Nürburgring, on a car that EATS front tires is just amazing.
Now on to the dry and wet performance. Everyday driving is great, the sound is not too bad (every single tire is going to be loud in an FK2 Type R) and handling is great when the tire is cold. On the track (the Nürburgring) the tire is AMAZING. For a road tire, once it gets warm, the grip is just monstrous. My friend ran Cup 2 tires, came on as a passenger, and was impressed by the amount of grip a road focused tire offers. The tire is predictable, feels great and sharp on tight turns and is very stable at high speeds. The sidewall is rather stiff, so the tire did not roll on itself too bad on high loads/low pressures (compared to for example Michelins, which have a very soft sidewall).
The tire is also very good in the wet. for about 600km-s I got to try it out in rainy Italian mountain passes and I never lost confidence in the tire. I don't think I had a single ''oh crap'' moment, even when pushing.
In conclusion, the Bridgestone Potenza Sport was about 50 euros per tire cheaper than the Michelin PS4S, and with the tire offering performance AT LEAST as good as the PS4S, I have no idea why I (or anyone else) should use any other tire for everyday (plus a little track) use.