Are all the tunes as homogay as that one posted?
Some sound like Persona 3, some sound like One Winged Angel, some sound like KH battle music
There's a little of everything.
And yes, the battle system is not the most exciting. It's not a bad battle system, but once you make a good strategy you can basically just do the same 5 attacks in the same order every fight and win.
Luckily they keep the game very short with not a whole lot of battles because I think they realize their battle system just doesn't have enough meat on it. I'm ~14 hours and I think I'll definitely beat it with everything done in 20 hours.
I'd recommend it to people who own psps and like jrpgs. But it's a B game through and through imo.