My mate has one on his SK1, while mine is still on the stock can. You could probably describe it as a meaty gruff version of the stock can, noise laws permitting it would be a nice standard can.
It definitely sorts out the 5K torque dip, giving a clean smooth curve with no fuelling mods required on carbs....and it's legal!
If you're looking for
you might be disappointed, but if :P will do, you should be quite happy.
He originally tried a Renegade round can, but we both found that too much of a drone in town, it just got annoying. The Quill would be my personal choice, but each to their own!