A good ending to the series. I actually teared up a little when Alex saw Simon and Donavon on the hill. I found the whole "stranger" side of the story to be an interesting and satisfying explanation to it all. I also liked seeing Alex go through the whole process. He's not a saint so he really did have to fight to get himself out of the hold of the nectar and the stranger's blood.
Also, Zee is the bomb.