This tutorial is about using the rc heli controllers in general. It is conducted using Spektrum 6i, which is a bit more basic than most controls. If you feel intimidated by all the little switches, knobs and buttons that you see on the rc heli controller for the first time, no need to worry. The most used components of the controller are the sticks that control the aileron, elevator, rudder and throttle.
Here is a video summary of the T-Rex 450 build that packs some useful information. It is not that great for crazy 3D maneuvering out of the box. The only modification that this model has is the Battery Eliminator Circuit (BEC) from Castle. Also the screws that hold in the motor are kind of hard to get to. See the video to find out how to deal with that situation and for some other tips.