Lets see... In my opinion, Mana Khemia is a great game, which has a awesome battle system and a good story.

User Rating: 9.5 | Mana-Khemia: Gakuen no Renkinjutsushi-tachi PS2
Story: Good. Uncover the truth about Vayne's past is quite interesting
Characters: Great. They are all catchy and will make you wanna spend your "free time" on the game with them.
Soundtrack: Excellent. Guitar solo and a beautiful ocarina(or flute, I don´t know) song.... You wanna more than this? Battle system: Awesome. One of the best battle System I´ve ever played... I don´t know why lots of sites gives horrible scores to

Mana Khemia, but in my sincere opinion, Mana Khemia Alchemists of Al-Revis deserves a 9.5.
So, if you don´t played yet, play it! I have certainty that you´ll love the game.

PS: Mana Khemia: Student Alliance is also a great game for psp. If you have a friend with a psp too, you can play multiplayer battles against powerfull monsters.