"I haven't had this rifle for long, but I've shot over 2000 rounds in it already, and participated in a skirmish with it. It was amazing.
Pros - High FPS, Great out of the box, almost indestructible, looks cool, accurate, amazing bolt, scares enemy :D
Cons - A bit heavy, tactical rail on it is a bit to far up.
This is definitely a great gun. It's high quality, for a low price. The problem with the rail can be fixed by buying this: http://www.airsoftmegastore.com/6693-CYMA-Full-Metal-M14-Scope-Mount-Compatible-with-CYMA-and-Classic-Army-M14-Sniper-Rifles.aspx
NOTE: Rail is only if you have a scope/sight you want to put on. It IS NOT a necessity.
I recommend buying a new battery as well. This rifle comes with a Ni-Cd battery, which are hard to maintain. Make sure you buy a Ni-Mh battery with at least 1200 mah and 8.4v, and a Mini-Tamiya Female connector. Here is a link to the battery I use: http://www.airsoftmegastore.com/2614-VB-8804-BATTERY-VB-Power-Hi-Performance-8-4V-Ni-MH-Mini-Battery-For-Electric-AEG-1600-MAH.aspx