I have been riding SS for only 3 months, and I am always looking forward to the next ride. Definitely a work out.
I bought my Solo One off Craigslist, it was 1x9. So an entry level bike can be a nice addition to your geared ride. It's weird to realize that you don't need a $2000 bike to have fun!!

MTBR has a dedicated forum to SS riding.
http://forums.mtbr.com/forumdisplay.php?f=46