I personally think the simulator is a much better tool for learning than a co-axial. The co-axial does not imitate the flight of a single rotor heli at all, it does help with orientation but a sim can do that and provide more realistic flight of a single rotor. In the future, you'll find the sim is also a good tool to learn things like figure 8s, loops, rolls, tick tocks... etc. You do have to use it properly as a training tool though not as a game.