I installed mine week before last just before the Fourth of July. I installed the Delkevic's 9" Oval on my CB1100. The installation was a snap and fitment absolutely perfect, including the link pipe with the center stand stop. For the money ($180), the materials, mirror finish and sound quality are outstanding! Surprisingly, its really not loud but rather has a deeper tone that kind of sounds like a subtle growl (baffle still installed). Almost no noticeable popping on decel and/or throttle response hesitation. Stock ECU map seems to like it. Just what I was looking for in an aftermarket exhaust.
Here's a photo of it on my all black (std) bike.