I've had mine for about 3 1/2 yrs now and I still love it every time I start that engine! Letting off the gas gives an awesome gurgle and full throttle is heaven! The best part is that it doesn't sound like an unmuffled engine. It really sounds like a great low restriction performance exhaust. You do have to have some tolerance for drone because the sound is always there, but for me it's no issue.
Electric Red / Beige 06 330i Manny Tranny
Sport, Premium, Cold Weather, Muffler Delete, Hardwire Valentine One, Colgan Sport Bra w/logo cutout