To me the brakes feel great. It certainly stops hard, when needed. I had not done a full force panic-stop before I got the new pads and rotors, so I can't compare before and after for full force. In normal operation they feel about the same as factory. The USR rotors are 100% silent in normal driving. I have not heard a single squeak or any noise from the slotting. Until the black coating wore off the rotors they made a groaning noise. Took maybe 20 minutes of driving. It scared the crap out of me when I first put them on lol.
Once all the bedding in is done, the dust seems about the same as the factory pads. The instructions were to put 200 miles on them BEFORE bedding. So for that first 200 miles, and bedding procedure they put out a TON of dust. That dust seems to have been from the break in coating on the pads, and possibly the stuff on the rotors. But yeah, the wheels were filthy for that first 200 miles. Now it's fine, seems same as stock.
The bed in procedure was to brake hard 5 times from 60 down to 20, (if I remember right). I was pretty merciless, when I did this. I got on the brakes really hard when I did the bedding. And it really shocked me how hard the car stopped. I Again, I never did this before the new pads and rotors, so maybe it was good before... but damn, it stops hard now.
I did rotors and pads because when I went to the track, the car would shudder under braking from ~105mph. With the new setup it is perfectly smooth. It will still make a humming noise under medium-hard braking from above 100mph, but it is perfectly smooth, no shaking, no pedal pulsing. And It does feel like it is easier to slow down after crossing the finish at the track, but I cannot be sure that isn't placebo.
As for wear, I only have a little over 1000 miles on them. Mostly suburban driving with 1 trip to the drag strip. I'll be honest, I haven't looked at the pads yet to see if they are worn down, lol. But with so little driving I didn't think it would be any noticeable amount of wear.
If you have anything else you want to know that I missed, just let me know.