I had one a couple of years ago, was a blast to shoot. Mine was 9mm and took the 30-round Glock mags. Sights were crude. I would have kept it of there was a reliable way to mount a red-dot without having to build my own mount or rely on Kel-Tec cheesy folding, "zero"-loosing mount.
Otherwise...I bought thousands of rounds of reloads from Lancer Custom Ammo and ran them thru that gun without ever having a problem with it. Makes a great bug-out gun as it folds to only 16", good CQC/home defense gun as it's small and can be loaded with HP's.
Do NOT use Blazer aluminum cased ammo in that gun though!