The movie was... it was fine. It was pretty well-done, but it was totally different from the books, and I really like the way the books go. It's not so much the characters and the setting and the FX all looking and sounding different from my mental picture -- you can't help that, and they weren't actually too terribly far off. It was mostly that the pacing was so different. Dialogue much faster or slower than I would always read it. Things which take a long time to describe in writing conveyed in moments with visuals, and vice-versa. The bits featuring the Guide itself were probably the best match to what I expected -- nearly perfect in delivery, and the graphics had some wonderful little add-ons.
So I enjoyed it, but I enjoyed getting to see a visiting friend more.