I second the simulator! I learned how to fly planes, and helicopters using this thing. Still use it after 4 years for all the stuff that would be too expensive with the real thing.

However, I do have a Co-pilot because I wanted a safety net for aerobatics. If you already bought it, and can afford both, keep it. I decided not to use it on my aerobatic ship, and now going to use it to stabilize my gasser for aerial photos.