I have been thoroughly impressed with mine, traded in my Kel-Tec Sub2K.
I immediately installed the Glock magazine adapter, and I have found that the Magpul 21 round Glock-pattern mags are the perfect length for this, added capacity but not terribly long hanging out the bottom of the carbine. I've been carrying it as a pack gun on a regular basis in a standard pack, but have been considering one of the Copper Basin Takedown Packs, for a more minimal "less tactical" look.
Perfectly acceptable accuracy at the distances I have used it at, and no hiccups other than with some cheap Tula 9mm that I ran through it, and I don't make that a habit of using.
Lots of new accessories hitting the market for it too, stocks, trigger groups, etc.