I had the same set on my '11 SG and my '12 Limited. Left them on the Limited when I traded for my '14 SGS because it already had a set installed. Love the RCX exhaust. Nice deep tone.
Had them on my '13 Ultra Classic and liked them so much I had them swapped over to my new '14 Ultra Classic. They have a deep rumble to them and don't sound obnoxious when you jump on it. Also sound even better with a decatted head pipe.
Am running them and notice alot of people standing on the sidelines stare when you go by with them on, so they either sound really good or really bad from a distance..........
I like em from a cost, and fit - finish point of view.
After gutting my head pipe I still wasn't sure about how they sounded. Just couldn't tell from the drivers seat. So I had a friend take it down the road so I could listen. Man these slip-ons sound sweet. The only reason I want the true dual setup is because I want it just a tad bit louder when I crack down on the throttle.