Just noticed this topic. I got that very one earlier last year, I think it was. Great little unit if all you want to do is just record sounds, layer them, maybe edit them a bit. But if you want more editing function you're better dumping files onto a DAW. For straight up, raw recording, it's fine. The inbuilt microphones are okay but nothing special. The big advantage is its portability and affordability. The disadvantages I suppose are there's a bit of faffing around with creating partitions and such, going between pages on the menu to do things like name tracks, adjust eq and panning and so forth - perhaps not much worse than working out a good analogue multi track. The problem of course is the more features a unit has, the more one has to learn. In truth, the eq-ing and other editing parts are probably more trouble than worth bothering with. And yes, the track "exporting" thing adds more time than should be necessary.
Mine has a power adapter included, so I'm not sure what the story is there.
Mostly I just use it as an interface between instruments and main computer. I got the thing originally because I wanted something portable I could record at different sites, and this is small and cheap. It could well be used as a back-up recording/editing device if and when my main computer dies, but I wouldn't rely on it all the time.
But I do like it as it meets my needs very well.