I have the AXE 400. I've had many equipment problems, mainly the Helimax gyro. I purchased a Futaba gyro, but due to the numerous minor accidents, it really wasn't much help. I have shelved the AXE 400 for now and plan on getting another brand of "400" or bigger. Parts are hard to find in my local hobby store too.
Do a lot of research. Over all it's not a bad heli, but there's better out there..