You may as well try it. Here's a short-short review from yours truly:
The gameplay: Slower than you're probably used to, but a little more strategic than your average "press X to attack" RPG. The card system sounds amazing in theory, but in practice, you receive cards over time that are obviously better than than the ones you had before; therefore, it's just a work-around substitute for the usual "buy the next set of equipment" upgrading that you'll find in any Final Fantasy game. I would have rather seen something more akin to Phantom Dust, where every card you find has potential use throughout the entire game, but at least it's something different.
The visuals: Simply breathtaking. The art direction is amazing, and a welcome change from your typical animu RPG.
The story: Rather typical for a JRPG, but it gets a few props for the point-of-view experiment, as well as for the big plot twist in the middle.
The voice acting: Sucks. It's better in the second game, though.
So, in short: If you like RPGs already and you want something a little different, it's worth getting for the visuals and somewhat-different battle system. If you don't, then it won't change your mind.
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom