Love mine.. has and OS 1.6fx in it. 18x6 prop seems to have decent vertical, but not unlimited . So far, it's my fav plane to fly. No bad habits at all. I read about the center section being weak, so I took carbon fibre woven cloth and took 6 " of covering out of the center section, and laminated the cloth over the section.. No problems at all now Great flyer. Mine hangs on the prop at almost full throttle.