I have one of these flying and another kit in the box. The one I am flying has a 120 FS. It seems to fly very good and it will do some aerobatics, rolling circles etc. Does not seem to have any bad habits. It is not hard to put together, but you should coat the wing and tail feathers. Ialso added tail bracing as I felt the tail feathers where a little flimsey. Also the nose gear is a little soft (bends easy) Flying I would say is its strong point. Rich