I really liked it, but the final battle was too difficult. There should have been an option to heal during a battle because the boss does so much damage it didn't feel possible to take her down before all of my party was defeated, even if I put debuffs on her with Mima.
The visuals and audio were great, and it had Keine in it in what might be the most creative use of a green character (no other game has used EX Keine that I've seen so far).