I hated nearly every second of it. Boring otaku bait narrative, unlikeable cast of cunts (except Sahz, he was pretty great), ten thousand miles of dull corridors, reliance on a database to make sense out of the shit unfolding before you, and so and so and so on. I played it up to the point everyone was saying "Sure, all you have to do to get through most of the game is push up on your controller, but it eventually OPENS UP," and that great bastion of open space MIGHT have been as big as the Calm Lands in FFX. I said fuck it and shelved it. :P
Battle system was fun, but not so much that it was worth sitting through all that bullshit.