To be honest with you it doesn't sound (The YouTube video that is.) or act any different than the screaming Eagle mufflers that everybody has been putting on their Streets from Harley Davidson. It would be nice to see a comparison, an A/B comparison between the screaming Eagle and some of these aftermarket mufflers if there really is a difference that would justify the cost.
It's really hard to go by what somebody says because the sonic memory is very short lived in humans. As we all know the shorter the muffler is the louder it will appear but the pitch and tonal quality may be different from muffler to muffler and may appeal to some and not to others. I guess I'm just adding my two cents worth here because I'm very happy with the screaming Eagle that I bought.