I have not had this gun out to any games yet, but so far it seems good. The gearbox had some imperfections but it still seems solid enough. Take down was a pain compared to M4's because you have to disassemble the trigger mechanism to mess with the gear box. But from the reviews I've read I guess all M14's are similar. The take down is not the same as the CA or TM versions so be careful and take notes.
When I got it from Airsoft GI it had written inside the box 367. So I chronoed it, and sure enough with Excel .20's it was right around there. I tossed an M120 in it and now it chronoed 373 at the highest with .25's which is just under the National OP limit. The variation is to about 10 FPS below that so not too much. BB trajectory appears decent, probably due to the long barrel.
I have not used it at any games yet, but so far it seems like a good gun. And for $120. it is worth the price. If your in the market for an M14, this seems like a good buy.