Re: How doest it sound?
I tried the de-goat, and did not like it. I didn't try the H-pipe, which does improve the sound, but it was really loud to me. I put my goat belly back on, and discovered that the modifications I did to the baffles in an attempt to improve the de-goat sound made the stock mufflers with the goat belly a lot louder. (I would give it a 5 on your sound scale)
The changes I made were based loosely on some of the posts I have read here and on other sites. Remove the screen on the front side of the baffle, and drill holes around the collar from the back (It seems like Beavis had some pics of this on his site) That really made the biggest difference in sound. Basically, instead of running all of the noise through the baffling, you allow it run straight out the back. I'll try to look where I saw the pictures of the drilling and make sure I was right.
Just my opinion.
Yes, the pictures were on Beavis' personal webpage. See the "Wow, real bike sound" posting.