[yuhaoyang]

I built a custom mechbox using modify parts...
It totaled to $400 just in parts inside the mechbox+motor, if I count that I paid for that fucked up G&P complete, and how it fried my CA motor, it would be $700.
Anyways, G&P gear shafts snap, the bevel gear shaft falls out, the piston is brittle, the spring guide coating flakes, the trigger contacts corrode easily, the selector plate snaps, the nozzle doesn't seal against BBs, and it isn't shimmed or lubed properly, ect ect.
It depends on what you want out of it. If you just want 400fps, then the JG one is cheap, and it'll do the job. When it breaks, throw it out and buy another.