This is a Game-Changer.
I'm going to gush, so hang on. And no, I have no commercial interest in selling these things. You've already read the reviews: a different tonal range and quality; slightly different ergonomics. All true. You will have to adjust your playing style to take advantage of this instrument, but the payoff is worth it. Finger-pickers: it can "feel" like a six string as your fingers pull up only on the larger string in the double-course positions. But as you strum down, you'll hit the octave strings and generate the sparkly drone that we associate with a traditional 12-string guitar. People who are accustomed to using a pick in unison with bare fingers, changing between picking and strumming, can sound like they're immediately changing instruments. The spacing between strings is a little broader, so get used to that. You can pretty much forget about bending strings. But if you like to play with harmonics, your options are exponentially greater.
You've got a greater choice of what role to take as part of an ensemble. It's great as a contrasting rhythm guitar, doubling up with a six-string. It works well as a solo instrument, too. It can serve as a bass in a pinch. Just plug in and go. I would discourage using this as a beginner's guitar; it is ideal for players with some 6-string experience.
I have no complaint with the construction. It comes with a nice hardshell case (with no locks on it). Curiously, it has no pickguard. The on-board electronics require a 9-volt battery which is conveniently integrated in the tail's strap button platform. I would have expected a slightly tighter grain in the top's spruce wood, but this is really nit-picking. Buying strings may prove to be challenging. If you use capos, get one designed for a 12-string.
Pretty smart product development by Taylor, taking a cue from automakers: just add a little bit more sheet metal to a sedan, and you have an SUV with a much larger mark-up. This is the guitar world's analogous concept.