Got my H6 yesterday and had the chance to examine and test some things as well.
It is a sturdy recorder in the manner of how it feels in hand, although I really am not impressed by the SD card door, as it will most likely in time simply rip off from the H6 body. I would have preferred them to have had an actual hinged door as they do on the Marantz PMD661. The 5v USB power was easily supplied using my Tekkeon MP3450, so no issues there.
The menu functions are very easy to access and change. I did happen to like the virtual VU meters they had too, although I am not sure why it was necessary to add them in the manner of which they did. I will most likely never use the metronome or tuner they have, but for a musician, it can be a nice bonus to have all in one.
Come this weekend weather permitting, I will try it out on an outdoor gig.
I do like that the size of this recorder, as the Roland R4 (not the R4 Pro, but the big clunky R4) I have is a dinosaur compared to this for portability and stealth matters.
The extra XLR input module should be shipping in the next weeks?