As everyone has said the Vibraprobe is rock solid and with no switches is almost unbreakable. However... I have one for beach and wet hunts and I really like it, but when it comes to a landhunting I've found I prefer my Tinytech probe.
Its pretty solid, turns off when pointed up so you can drop it in your bag between uses and it has a slimmer probe end which I like as well. They are worth checking out.
Sorry can't comment on the automax, I've never had one.