I'm not a fan of "recap movies", in fact they're one of my pet dislikes. The main problems I have with them is that in compressing the storyline a lot, if not most, of the motivations behind the character's actions is lost and more annoyingly there are sometimes changes to the storyline. Although these things probably only bother those who have seen the original TV series.
I have the same misgivings about "films of the book", especially when it's a film of a book I have read and have a very good knowledge of the story.