There are a few on here with Blue Flame exhaust cans - we've got them on 3 bikes - Aprilia RSV1000, Fazer 600 & Fazer 1000 - all run sweet as can be, baffles in or out (the all seem to run a bit better with the bottom baffle open though). Aprilia has done 20k miles with the can and quality-wise, it's as good as new (all 3 are the stainless twin-spout versions). Fazers have 10k miles ish each, over 3 years and 5 years - again, no issues at all.
In our opinion, they sound good and look good too - 4 levels of "loudness" to choose from.