Okay..now that I've read everything but the last few chapters of "Mostly Harlmess" I'm totally glad that I saw it before reading. They definetly mixed things up a bit..not too bad. Don't know why they even encorporated "so long and thanks for all the fish" in it since that's not brought up until the third book when Arthur is back on Earth. Thought the Vogons were pretty good, Zaphod's head definetly was not what is should have been. What the heck was the whole scene with him leaving his head with that guy? That doesn't even happen...at all? I don't think that the fact that Earth was the better computer that Deep Thought created was made clear in the movie.