Phantom Brave is a fun game. It just takes a while to get into the story. Once you get into the story and have a sufficient army, you should be fine.
I prefer it to Makai Kingdom.... and its a bit better then Disgaia. With both games just remember you have a set amount of people you can summon, and train people up evenly. You most likely will not be able to go straight through one time.... so patience is very much needed....
