I got to play this for about 20 min. at TGS. I haven't read the other impressions yet, so this may seem redundant, but what I played seemed pretty good.
There were three sections to the demo:
-The intro section that we've all already seen
-The first dungeon with the demon wall battle
-The overworld
I chose the overworld section. Exploration felt somewhat like TLoZ in the way you progress from area to area seamlessly, but it seemed a tad linear. I ended up rushing through each area in order to see as much as possible, and I obviously missed some stuff. It seems like there is a fair amount of items or areas you can backtrack later on to reach, so it may not be as linear as I think. The graphics were nice and colorful, although nothing compared to the quality of the PS3/360 stuff playing endlessly on the bigscreen next to the playing area. In terms of style, however, I'll take Crystal Bearers over FFXIII any day.
As far as control goes, it takes some getting used to, and I didn't entirely feel like I had mastered them in 20 minutes of play. Using the d-pad for camera control was not really convenient, but thankfully there is a button on the nunchaku to center the camera. I'm sure after the first hour or so, the controls would be second nature. I couldn't really hear much of the music, but the trailers probably give a pretty good indication of what to expect.
Overall, pretty fun, and definitely something I'd pick up upon release.