I am just going to address the looks.
It is my own personal feeling that this looks like someone put a Harely Davidson exhaust on a sports bike. While I am sure it will work performance wise, in my view is clashing in looks for the accepted norms. On one hand the general picture of that side of the bike says I am all sporty and modern, yet the pipe says I am a heritage classic V-Twin cruiser, maybe a cafe-racer-esk?
But, I don't know if I can throw that stone, you see, I have put a small rather ugly top box on my Rocket that people have hated, so.. Yet in my defense, I had no other choice, nothing works well top-box wise on this bike without ruining the sport-modern look. But in the exhaust department, there are many other more "fitting" slip-ons to preserve the look continuation of sporty and modern.