What marked the book out as more than a mere comedic romp was the density of ideas that Adams managed to distil in the text.
I think that reviewers need to realize that this "density of ideas" just isn't going to be possible with a film and still keep the running time under 3 hours.
Understandably perhaps, huge swathes of the novel have been cut in order to make a consistent, story-led film.
He says he understands...but doesn't seem to keep this in mind while writing the review, just because his personal favorite parts of the novel have been cut out doesn't make it a bad film.
I think this is going to be the biggest problem with reviewers and this movie, everyone has parts they loved from the novel and they will be disappointed when they are not present in the film.
I think I'd like to see a review of the movie by someone who has never read the books, perhaps they would be able to give a more objective opinion. On the other hand maybe it really is bad, and I am just vainly clinging to the hope that this film will some how do justice to the books we all loved.