^^^ A "number" of obvious shortcomings? I'd say the headphone amp is fine and recording multi track I don't even bother to bring headphones any more. And as for linking stereo tracks...eeeh who cares, do you REALLY need to be able to have the levels change at exactly the same times. For me I record in mono mode anyway so I really couldn't care. But even so the extra second or two it takes to hit the button and set a level is no big deal. And I'm not sure what you mean by "less than sound mechanical details". If you mean it is not a metal cased unit like a sound Devices you're right it's not. Does it make it less than sound mechanically, I don't think so. Will take physical abuse like an SD box, probably not but then again if you are planning on that kind of abuse why buy something that won't handle it. I'm more than pleased with the unit and it has preformed flawlessly so far and exceeded expectations. I've run a SD MP-2, UA-5 BM2p+ and a Lunatec V2 in front of it yet the stock preamps will hold there own against the other pres no problem. The ONLY thing I'd like changed is that the over meter shows actual overs. A peak hold would be ok too. I even like the meters once I got used to them. So as for obvious shortcomings, I'd say Tascam has hit a home run. Any deck that my wife can walk up to and use after NEVER running anything before means that the layout is very easy and intuitive. What more can you ask for?
Fair enough, but, IMO (am I allowed to say?), I see a few shortcomings, as there are in just about every piece of gear. The headphone amp output seems low to me, as I've heard others comment. The build is pretty plasticky, it's a fact. This was to save money, no doubt, which was hopefully then put towards the preamps etc. If that was the case, I'm glad of it. Obviously I'm hoping to overlook my minor gripes and appreciate the positives of the deck, of which there are many.
Anyway, I'm VERY glad you're finding it to be a great machine in practicl use (which perhaps is all that really matters). I trust I will, too, now I've got the FW update sorted out. My criticisms weren't intended as a wholesale put-down of the machine, so please forgive my perhaps clumsy earlier comments!
Cheers
Dave