I have enjoyed a couple in the series, but they are a bit hard to recommend. All of the story lines are anime-ridiculous, have a mixture of fun and grindy minigames (the business development loses its luster pretty quickly), and a lot of trapsing around the map doing fetch quests for the lost soul du jour.
If you want a great story, it is weak. Looking for a great tactics game, it is weak. The combination of gameplay styles is a ridiculous ride, but I can see how the genre mashup has limited appeal.