I was really thinking about getting one a while back, then had this weird paranoia I'd lose it down the hole. So for about the same amount of money, I sprang for the Aqua Vu AV715C. I like that his a much longer battery life, and is bigger. Not a run-and-gun option, but it works for setting up and watching the lines, which the kiddos love.
I have seen some outfits that actually mount the Micro to your flasher, which would eliminate that whole "drop down the hole" fear. Might be an option for a dedicated hole hopper.