The book was far better, and I overall enjoyed the movie, but I'd have to say it was only "decent." I disliked the way it was kiddyized, and the romance between Trillian and Arthur just didn't seem well done at all. I didn't like it when it strayed from the book, but I know it's good, because if it was exactly the same it'd be dull. Some of the stuff they added in was hilarious, and other parts were just a bit lame. Zaphod was outstanding, and Alan Rickman was perfect as Marvin. One thing I thought was awesome--seeing the BBC show's Marvin in the line on Vogsphere. Sweet cameo.