The kit is pretty fair, but the battery duration claims are off and the indicators on the battery are completely unreliable (most users complain about this). The display provided stopped working after a couple of months, but support send me a replacement as soon as possible. These two issues made me question the build quality of the kit, but only time will tell about that. I would also appreciate a larger capacity battery option for the AIR/MAX kit. GO is cheaper and with larger capacity batteries. It makes us AIR/MAX users feel a bit of ripped off to be honest.