Well, for starters, this is a very good gun. The FPS is high, and some would argue, too high. The rate of fire was decent, but I added a 9.6v battery in place of the 8.4v that came with it. I really like the color of the gun, and the parts are all metal with the exception of the handle and the hand grip. The clip that the gun came with is also cheap plastic and so I bought a metal AK-47 clip and it works great. This is a solid gun. Recently though, after having the gun for about a year, I have had problems with it. The gearbox started to jam every now and then so I took it apart, cleaned it up, greased it, and put it back together. It fired a few times, but then jammed again. I am not sure what is wrong with it, but I think that the plastic parts may have worn down from use and may need to be replaced.
Pros: This is a powerful gun that makes enemies run from you (as long as they have pistols or worse guns) and it fires extremely fast, about 400 fps. It also has a folding skeleton stock which is nice.
Cons: Until I bought another battery, the rate of fire wasn't real great. About 600-700 rounds per minute. with the new battery it was shooting around 900 rounds per minute. That will make anyone run from you.
Conclusion: Great product, the only problem is that it seems to wear out over time. Take good care of it!