I've tried Phoenix, XTR and RF4 and personally think that the training senarios in RF are the best of the 3. It's not the best graphics but I really didn't notice much difference in the physics between the three. Anyone of the three will work to help you learn and fly which is the purpose of a sim. It's like debating the best .50 nitro out there, so many choices but you really can't go wrong between Align, Thunder Tiger, Hirobo... etc. All are good.