Hi Uber, I used R-DAT in studios without any issue. Fast, accurate cue-ing, indexing features and excellent SQ. One studio was NFL Films where all sound was shot using DAT. It worked flawlessly in the field and studio. First generation decks had some bugs.
I encountered a consumer grade DAT once while working in a studio, and although it had equally high quality sound, the transport wasn’t as accurate for cue-ing and some tapes had tracking errors.
In my friend’s home DAT sounded fantastic. He used it for archiving and mixed tapes for partys.
If you go DAT, my suggestion is to buy a professional-grade recorder. It has a time code channel for sync even if you don’t intend to take advantage of it, ie, editing.
You’ll have to weigh cost and benefit of tape vs other other digital recording devices.
Portable DATs are cheap on Ebay, I have no knowledge of their quality.