I got to drive the car today quite a bit in different conditions (highway, city, residential)
On the highway the car sounds good and is not droning or annoying at all.
It is a little loud going through first gear and under load at slower speeds, 35 - 50, it can be a little annoying and is a little louder than I would like.
It seems pretty loud to me while in the car but it didn't seem to draw too much attention from others.
My wife thought the same thing - a little annoying at times but overall not too bad.
We'll leave it on for a week or so and see if it becomes a pain or if we get used to it.
Neither of us want a car that sounds like a 70 Cuda with glass-packs. But I do want it to sound like a performance car and not a 328i