From what I've heard, Milltek has usally been pretty good, but its new exhaust line for the B7 S4 isn't up to quailty compared to Neuspeeds. Neuspeeds is also a couple decibels louder than the Milltek one and (in my opinion) is a better made exhaust than the Milteks. The only problem with getting neuspeeds is that they do NOT come with downpipes while the Milteks do. What I'm doing though is I'm just going to buy the downpipes and attach them on to my neuspeed catbacks to solve the problem.