I have the mini Harley sissy bar. This is a non-detachable one, but I think it looks less obtrusive and clunky than the removable one and I can easily throw a leg over it.
You can get a little cushion for it, but it seems to work effectively as a "butt stop"
2016 Roadster Vivid Black - SE air cleaner / FP-3 / Cobra Speedster RPT exhaust. NRHS 1250 kit w/ Hurricane Cat 3 cams. Daymaker headlight and Custom Dynamics turn signals.