Overall I thought it was great, but the fact that I kept expecting it to end at some point, but not exactly when meant that the whole second half felt a bit long and drawn out. If I went to see it again knowing exactly when the split was, I think I'd enjoy the second half a lot more.
Edit: Also, I found it funny near the end when Boern grabs the black arrow, and his son is all like 'Da, I didn't know you kept one!' and i'm all like 'Bitch, it was hanging in the kitchen next to some herbs. Use your eyes.'