Well I got out with it today. Did about an hour of all types of riding. 08 SERK......Stop and go and one little 100 mph cruise to see if they would blue. "So far" here is my impression compared with the sacks.
Idle sound goes to BUB it really sounds better, low Harley sound
Light acceleration to BUB Low to mid rpm again nice low throaty sound
Heavy acceleration high rpm to sack high rpm sound is great!
Cruise to BUB nice tunes out the back!
6th gear cruise and acceleration definitely BUB! Nice Harley sound without all the drama!
I realize this is all subjective but "so far" I like the bubs for the bike and riding that I do. They are quiet. I think ZEB said his wife thought they were too loud. With all due respect, I can't imagine them being to loud unless they burn out quickly. Oh, and these things stink while they are breaking in.

I have some video with sound if I can figure out how to post it? I hope this helps someone as much as the other posters have helped me. Oh and they still have to pass the boss's sound test or to ebay they go!!!