-it is small and light enough to use in one hand, but heavy enough to feel like you can do some damage with it. its great for running, very mobile.
-the back sight is pretty nice, the front one is ok, too, i guess. they both are flip up, so it is nice for storage.
-rate of fire is pretty good with a 9.6v battery.
-uses all m4/m16 type clips.
-easy access battery compartment.
-motor grip is amazingly comfortable, but makes it practically unusable for left handed people (but m4s are made with a right-handed selector switch, so no big deal.)
-surprisingly incredible range and accuracy considering the length of the barrel.
-RIS needed to be tightened, it won't stay in place if you turn it slightly. this could make using a front grip on it slightly hard.
-the hop up on mine only allows me to shoot .20s with any accuracy, but that could be fixed with a better hop up system.
Rating: [5 of 5 Stars!]