Been reading a lot about the TG-6 today. I really appreciate everyone's comments.
A couple more questions:
* TG-6 battery life? The Micro has seemingly infinite battery life. I took it on a one hour dive, and two lengthy snorkel sessions, and the battery indicator never came off 100%. The GoPro, on the other hand, was 60 minutes per battery, period, end of story. Yes, that's about a tank's worth and I could swap the battery during the surface intervals, but I have to say it was nice not worrying about battery life with the Micro. Of course this presumes the indicator is accurate... maybe it just crashes to 0% suddenly at the end.
* What sort of attachment points are on the deepwater enclosure, for lanyards and such? At least one review complained about the attachment point(s) but I couldn't tell if that was on the camera itself or the case. I suppose I could always run an eye screw into the 1/4in screw mount on the bottom.
* Any limit on the size of the MicroSD card in the TG-6? The GoPro I was using had some sort of max size, which meant I had to also swap the memory card every time I changed the battery (which meant every surface interval).
The reason for asking about battery life and memory capacity is that I'd prefer to set up the TG-6 before the first dive and never open the case while on/near the water or dive boat. If the battery and memory can handle a multi-tank day, it insures the camera will remain dry because its access doors never have to opened while sloshing around wet people and wet gear.
Thanks!