It does its job EXTREMLY well and at the cost of no efficiency to the CO2 usage (since it use the blow back gases.) I would say the unit is worth every penny, I could not play anymore with my 12v revy and a regular elbow with my E-grip gun that will shoot at a ridiculus ROF.
I set the ROF to 18 balls per second, I did not break one ball shooting 50 paintballs.
Easy to install (especially if you have the Custom Pro). Will feed very very fast, also it is impossible to gum up the loading like if you break in an elbow.
Possibly the large elbow, but I haven't been hit there yet. Difficult to uncock gun so as you don't load a ball in the chamber (although you may just lose one ball or catch it and reload it). Also becareful because of "phantom" balls that will shoot out even after shooting multiple dry shots.
