I only rapid read if I feel I haven't gotten enough out of the super read and dip (activation) phase. There are some books from which I want more than the explicit details. For instance, I was able to get the stuff I "need" while super reading and dipping. However, I get this nagging sensation that I want more (Maybe, in this case, I want to enjoy the author's stories or explanations. Maybe I want to understand their rationale or the way their thought process works in relation to this topic). However, for many books, super read and dip is all I need. There are even some that I just PR. After PRing, I have a strong sense that I don't need to do anything else. Trust your feelings.