Visions had the issue of the demo dropping you midway through the game, and suddenly dumping a lot of mechanics at once on top of you, which was very confusing and offputting.
I think for JRPGs in general the best demos are the ones that let you play the beginning of the game and carry your save to the full one. That sold me on the Romancing Saga 2 remake, which was also by the Trials devs.