I like my Leo cans, the looks, and especially the sound....but I bought the bike with them. I did take the stickers off. It also has a decat pipe and it gets a little warm when sitting in traffic for a while. I can't compare to stock exhaust as I never rode it with one.
I also noticed recently that I have a slight exhaust leak where the left can joins the pipe...not sure what to do about that one, but this seems to be causing extra heat on the left side.
crappy phone pic(had to take it to contest a parking ticket the other day)