The report sounds great. It seems to have a pretty good gas efficiency if you keep your firing to short burst.
http://www.youtube.com/watch?v=DBMS7_Sw8j0 Performance leaves a little more to be desired IMO. Too much variance in velocity to snipe with even if you can get around the "semi-only" rule, and too high to use in must places. RA-Tech says they can adjust the FPS to meat anyone's FPS regs. They show a picture with the gas plug out. This system may be adjustable from the factory. That pretty neat. You know anything more about this? They sell them $250 +s/h
http://en.ratech.com.tw/index.php