I've had mine out 4 times now and have made some observations that i'll share. some of you might find this stuff helpful.
a few things up front:
Ergonomics / menu:
easy. a nice deck to operate. the pleather case that ships w/it is excellent, allowing you to secure cables via all sort of entry ports in/out of it. The menu is farily straight forward. It comes up from "off" to "ready to roll" in 3 seconds. That is nice. I suspect most people will not even need to access the manual. Its fairly intuitive, and if you understand what you are reading in the menus then you're all set.
recording
I've been running line in. When you first turn the unit on, you must access the "recording levels" menu and make an additional adjustment of dropping the levels down from 0db to -10db, give or take. Otherwise it runs too hot and you'll overload the deck. This is sort of a bummer. I'd like there to be an optional preset or something so that the deck comes up in 3 seconds ...and is actually ready to use based on my preferences, not its default settings.
Maybe Marantz just spoiled me w/this feature.
Otherwise, piece of cake. Hold switch is easy to access. Headphone amp is ok. line out is also ok sounding. Transport features are a little clunky. Accessing files is not exactly intuitively laid out in the menu, but not a super-hassle or anything.
Levels are fast, accurate, detailed...and LARGE. Definately better than any of the Edirol decks, and easily on par w/the larger tascam/marantz offerings. I really like how they devoted the entire display to the levels. The counter runs in TMI mode (ala SD7xx boxes) right down to the 100th of a second. Files split at 25min / 1gb. Seamless.
Sound
sick. absolutely breathtaking at times. Maybe i'm biased (certainly) as I already have it in my head that I like DSD/SACD sound over DVDA/REDBOOK. Maybe its as simple as a shiny new placebo w/cool levels bouncing around in my bag that leads me to believe my recordings have certainly gone to the next level.
I'm pretty confident that what I hear coming out of my stereo is only what i'm putting into it (signal / source wise), and if that is to be true...damn. then this is the best sounding recorder i've ever used. I have not run my Church-Audio AT853s into it yet (though I plan to), so I cant comment on how its preamp sound or perform.
I've run it directly into my stereo...and it sounds excellent. I've taken the DSD files to every resolution of PCM, and again they all sound exceptional...well beyond most of the PCM masters I've made..ever.
I hear depth. I hear realism. I have sound that projects out of my speakers, and not just in between them ....but out in front. Weird. Even times when there is no music playing and its just crowd noise in the venue, the detail and sense of space just jumps out at you.
for the same price of what a new M1/D100 was, this is truly the "next level" in a hand held recording deck. Thats my $.05, fwiw