The two biggest problems (for me) with JRPGs - prime example being the Final Fantasies - is that you have to do a bunch of grinding (unless, in some cases, you are really good at optimizing your playstyle), and that the plots has a tendency to start out interesting and personal, and then go on an obscure tangent that''s hard to understand and harder to care about.
For the trailers this one looks and sounds pretty good, though, and the reviews seems to be stellar.