I love mine. The only time there is any drone at all is when cruising at speed and you every so slightly tip into the throttle, but even then it's not bad at all. My car is a roadster and I was discussing this with my wife recently, at 80mph on the freeway with the top up. We were conversing in normal tones, no problem. She said she didn't notice anything even slightly irritating, loud or otherwise obtrusive. And I know the roadster has more wind noise than the coupe and would be more prone to letting in exhaust noise.

The exhaust tone is also different if you lug the engine a bit, say moving in slow and go traffic and you didn't bother downshifting to second from third and now are accelerating moderately from maybe 1500rpm.

Other than that, in 99% of driving, it sounds fantastic.