I just ordered this.. Let me tell you it's been a long time coming for technology like this to make it's way back to Airsoft. I put down my Systema PTW for this as well. I have a friend who owns one of these and it was the neatest most reliable peice of technology I have seen for Airsoft. This is a definite must have.
Consistant Shot FPS
Cheap repair if ever needed
Not a lot of moving parts
No gear ratios to mess with. No "Shimming the gears"
FCU (Fire control Unit) which eliminates contact triggers No need to put in a MosFET has it all.
Uses Standard AEG Mags
3000psi tank you can get around 20k shots
Customer service is amazing by Polar Star
Not all parts to work the unit are included.
Have to spend an additional 150-200 for it to be fully functional.
Rating: [5 of 5 Stars!]