I've had one on my car since February. Quality of construction and sound are excellent, no drone. Love the way it looks, similar to OEM but a little more aggressive (tips aren't completely swallowed up by the rear bumper). Bolted right up with no problem (Perrin downpipe). Only downside was installing it out in the driveway in February.
Pretty pricey though. Certainly gives the "exhaust is just pipes" crowd a clear target. At the time I was thinking that since I plan to keep the car it was worth it, but if I had it to do over again, I don't know. I'm not taking it off, though.
ETA pics. I'm no photographer, but you get some idea.