Addictive just like FFXI :)
HardReset already pointed out what makes this game so fun, so I'll keep this short.
I've been testing Braver for Mith for a few weeks now and I have already put in over 60hrs. The balance between your party and bosses are spot on. The job system gives you the flexibility to play what you want and how you want to. Even if you have never played Final Fantasy XI, I still recommend you give this game a try.