Good trilogy. I really liked the development of their relationship. I would be interested in reading a sequel to part three. I would like to read Buffy's reaction to Spike after the fight with Glory. Would she die or would she live because not the change in their relationship?
The ending to "The Gift" in Season 5 is unchanged. But Season 6 will be different because of the change in Season 5 covered in this trilogy. I've started a Season 6 rewrite (warning: WIP) that picks up after Buffy's leap off of the tower titled Edge of Sorrow, Heart of Truth, which I've been posting on AO3.