I went to a Legacy Sports shoot, I work for one of the companies they own, and got a chance to put a magazine through it with a few other guys from the company. Overall opinion of it was favorable and most people got back in line to shoot again. Within a few hours we had probably put several thousand rounds through the rifle. After that much rounds I guess it started getting sluggish, I didn't notice anything, but some of the LSI guys started yelling about how it is dry and dirty and needs CLP. I was one of the first guys to shoot it so it wasn't that dirty or warm, I personally to my knowledge was the only one to have issues, first round got stuck going up the feedramp, last round stove piped. It was standard FMJ 9mm. Like I said, most guys walked away feeling as though they wanted one, I personally was less than impressed. I guess in my mind it is just a cheap knockoff of a real fighting rifle. IMO the synthetic stock is ugly and feels weird.
I am sure they will run fine if you guys decide to buy one. I am sure most guys will enjoy it. I haven't shot a lot of pistol caliber rifles, but I've sold quite a few. There are a lot of them out there that are better buys IMO than this. The biggest advantage this thing has it is cheap and mags are everywhere.
Hope that helped someone.