Iv not had problems with my TT90 yet, what failed on yours? 33 hours is the time logged in flight.I have to admitt that it is a bit mushy in the air and isnt as sharp as it should be. I love the look of the thing and Id love to see the real thing in action, but I would not buy another one either. The quality is bit a down in comparison to other models that I have eg: the cowl is cracking and position of the fuel tank was barmy , I made lots of mods but thats what I like to do with my models.