I really, really wanted to love this film, but I hated it. The books were superb (I admit I've never listened to the radio version), but the sarcastic satrical humour was completely missing from the film, to be replaced by brain dead slapstick.
Ford was pointless, Zaphod an imbecile, Trillian really didn't seem that bright, and Arthur lusting after someone he met only once drove me nuts. Don't even get me started on Marvin, he could have been excellent with the voice of Alan Rickman but was a huge let down.
I'm off to order the tv series from Play.