I had one of the .25 size for several years..Reason for getting it was to break in 4 Magnum 30 4 stroke engines..all engines were inverted and the low speed idle was very good....only one engine did I have a problem with, and that problem was resolved..as far as the model goes,flew very good and was very fast....landings were 'Hot", but no problems there...I sold it about a month ago...believe he was going to install a Magnum 28 2- stroke in it..of course I sold him the engine too....I can think of only one problem with the kit and its the landing gear..If you fly off of grass,bent the wire forward to avoid nose overs..also get bigger wheels..was alot of fun flying this plane..I highly recommend it...