wondered about that auto off feature, that would be handy for my wife but my OCD makes is superfluous for me. The crash detection I am pretty "meh" about.
they are a bit pricy, but you get what you pay for. you could pick up a Packtalk Neo and have all the features of the Edge and Custom, but not the Air mount. or grab a Freecom X2 or X4 but no Mesh/DMC.