The first one is a major slog, and the next two aren't significantly easier to get through. I thought the ideas were fascinating and the overall story was pretty good. But the characters are all completely flat and uninteresting. I had a tough time remembering who was who, but it really didn't affect the story at all.
Additionally the writing was not great and, especially in the second and third book, very sexist. It was worth it to read once, but I definitely won't be reading it again. My spouse keeps asking if I'll watch the show, but I'm on the fence. I heard they condensed the characters to a more streamlined cast, which would be a good start. But I still doubt I'll watch it.