I moved from an Arrow to the Hangar9 T-34. Not a bad transitional "warbird", but make sure you've got enough power (I went from a Magnum .46 XL in the Arrow to a .46XLS in the T-34) to get it off the ground. Once up in the air, I found it to be a bit "twitchier" than the Arrow, but very controlable once you get used to it. Landings are a bit hotter than the Arrow, and you've got to pay more attention as the Mentor will tip-stall if the speed gets too low. I'd also change all the plastic clevis's to metal, so you don't repeat my loss of elevator control at the top of a loop. The Mentor does a great vertical dive!