Hey guys, I have 2 of these and bought 1 for a friend as a present.  Between the 3 rifles we have about 800 rounds through them and the only problems have been 3 failures to eject and 5 failures to fire (defective ammo, had multiple strikes from different guns and just would not fire).  All but 2 of the failures to eject were due to ammo.  I love these guns and wish they would make one in a pistol format so I could SBR it.  

        Downside is that the magazines are expensive and hard to find but I imagine most of that is due to the panic surrounding anything high capacity.  They load easier than the GSG 5 mags  Also the folding stock model isn't really good at keeping the stock locked open.  It locks great closed but when it is open it is easily folded if you bump the stock.  Get the wood option as it has a nice tight fit.  The two wood ones I got had a rear bottom screw that was not long enough but a quick trip to the hardware store and 75 cents later solved that.

         I will add some pictures later by editing this post.