I have 2 of them. 1 works and 1 is parts. lol what is wrong with them..

1 - Only rear wheels drive.
2 - not a 'locked diff' so 1 wheels can steer
3 - wheels are hard plastic
4 - only front wheels spin
5 - cannon level has to be moved by hand. not rc
6 - controller is very cheap.

now if someone took one, gutted the reservoir out of it, re-made the axles, put chain drive on the inside and used some gear boxes and made it like a tank that would rock.

also flashing 'cop' lights on it get annoying.

edit: the pump is actually good. its a 3 roller style and has lots of punch.