The MCX is a coax, which is very stable, and will only teach you basic orientation and throttle control. With the MCX, you can take thumbs off sticks and the thing will pretty much stay where you put it. To fly a CP, you will need to be much quicker anticipating the movement of the heli as they are much less stable, plus you have the added bonus of getting and keeping a good setup, which includes but isn't limited to throttle curves, pitch angles, and blade tracking. A PERFECTLY setup CP heli will give you only 2 to 3 seconds of thumbs off time without needing input to keep it in place.