I've just beat the game. It wasn't easy, but it wasn't too difficult either which is what I definitely enjoyed. The 5 chapter campaign is a lot of fun and the glitches are minor.
I do have one big concern and that is there is no real build up at the 5th chapter! We get a final preperation quest of course but besides that the 'boss' really didn't feel like one. Could probably do with a cutscene or something for it.
Also all the quests are the same, go to a place and then combat. Hopefully in the future there will be more variety but besides those two things this game is really good and I'm excited to see what comes in the future.