I was in the same place as you and decided to take a chance on the Remus based on the youtube recordings since it was extremely unlikely that I would ever come across anyone in the flesh with a Remus. It also did not hurt that Remus is one of the largest manufacturer of after market exhaust systems in the world. If you haven't already done so, be sure to read ALL the posts about Agency Power.
What I can tell you so far is that the Remus arrived very well packed with no damage and is an exact fit with perfect alignment. With respect to installation, it was a very easy one person operation. It was more trouble and took longer to get the stock exhaust off and I did not even have any header bolt problems...the Remus is just that easy.
So how does it sound? Don't know yet. Car is not registered and (I know everybody is going to jump all over this) I don't want to just start it in the garage without being able to really run on the road to operating temps. I'll post again after first run.