So far I'm pretty happy with this exhaust. I bought it because of the clean design that doesn't have pipes and mufflers sticking out from under the car, it's all pretty hidden. I have not run mine yet, but I have heard one and I can say that they have a nice sound and are fairly quite. Testing on these shows no loss in hp when using the muffler vs with out, so you can make power with out being too obnoxious. I like that stealth factor. The finish on it is beautiful, the welds are perfect, and the material is very heavy gauge. On the negative side, I had to trim the underside of my apron to get it to clear, but I'm sure this is because of my tight 36 hp engine compartment, I don't think later cars would have this issue. I also had to trim the slip joint pipes a bit to get it to all fit together, but that wasn't too big of a deal. I'll update this thread after I run the car and drive with it and have more of an opinion on its sound. Till then here are some pictures of it. I will post more pics later...
Here's a video of the car running where you can hear the exhaust....
http://www.youtube.com/watch?v=Yb1HfBiqqAY