Running the CGS axelback for about a year now. Decent sound, not too loud. Not worth the price but bolt ons seldom are. I imagine you could get a Magnaflow and fab mounts for less, but for me this was the best option of price and easy install with no hairpulling involved. It does seem to have better power in the normal driving range but cannot confirm or deny the sellers claims of major gains in hp. Mileage is running about 2-3 mpg in town increase tho... they claim a 14 hp gain on the turbo but that is a whole different ballgame.

 

I've got the magnaflow set up. I love the sound, install was easy too.