"I got this gun a while ago, here's what I've noticed:
-Lighter than I expected, but heavy enough that it doesn't feel cheap.
-Stock folds and extends and has an adjustable cheek rest.
-Compatible with M4 mags (apparently there are some that don't fit).
-Hop-up is easy to access and works pretty well.
-Rate of fire feels kinda low, but helps for conserving BBs.
-Largest battery I can fit in the gun is 9.6v 1600mAh.
-Ambidextrous fire selector switch.
-I hit this gun on things often, but it shows no signs of falling apart anytime soon.
-Rear iron sight is terrible (it has this little range adjuster thingy that you have to turn to keep the sights level, but it doesn't stay for more than a few seconds).
-Battery compartment under the barrel is awkward to get to (I bring a screwdriver with me to pop out the pin that holds it in place).
-The battery compartment's wiring broke or something, but was fixed fairly easily with a little electrical tape.
-Nowhere to hook up a sling that I'm aware of."