I remember getting it and thinking it was cool to have supplemental material. I do not recall another book where there was more spells and classes to pick from. It was the new and shiny- precious as it were. I do not remember how much we used it before 2e came along, but the feeling is options was what I recall. Now, a new splat book comes out and we are all- Xanthars, SCAG, Mordinkinans (sp)- meh.