the MX400 isnt even made by helimax, it's made by ARK (x400) and designed by the same person as the Trex under the helimax brand. It will fly as stable as a trex out of the box, it will do 3d like a trex with lighter paddles and some larger blades. if you crash it, some of the ARK parts are cheaper than Align parts. If not, Trex parts are directly interchangable (everything except the maingear and frame).

the X400 can be found for under 90 shipped. Trex is a better heli though if you spend the extra $70 for an XL or Benjamins for the SE.