Friend of mine has one and I fired it. It shot just like an AR, was pretty accurate at about 100 yards and cycled everything it was fed. My only problem was it cost almost twice as much as my home built AR and really didn't shoot any better.
If you are into the whole piston craze, then yes it's a great AR. If you don't really care for the piston, go find yourself a M400 or build your own AR. That's the cheaper route and you can get it however you want it.
