I have read a few reviews of the HHGTTG film and nobody has liked it, but now Douglas's Biographer has comeout with a very lengthy, and damming review saying how bad it is.
Spoiler Free Version & Spoilers Toppings And All Version
His conclusion is that the film makers spent far too much time on the visual details and completely lost sight of the comedy. He even mentions that they fuckedup the 42 joke by not building it up! I mean that is the best joke in the entire play because of the anticipation, but if they weren't going to get that joke right they might as well have not have bothered making the film at all.