Don't own one, but shot one
yesturday at the range. Gentleman was kind enough to let me run half a mag. We were only 40 ft from the target but it seemed accurate with the CCI ammo he had.
This is just my honest opinion. If you are buying one to supplement your real AR then I can see the benefit. If you just want one because it looks cool I would just buy a Ruger or Marlin autoloader. The 1522 appeared to be all plastic, polymer on the exterior and seemed weak at the butt stock.
At the $500 + or - he paid to outfit the 1522 I personally would buy something else. Different strokes for different folks however.
P.S. To show I'm not biased, I never saw the point of the Ruger charger model either. Get what floats your boat.