Here's a review with which I agreed from The New York Observer, which concludes with the following:
I believe that Mr. Jarrold and his scenarists have been unusually faithful to the bleak vision of humanity Waugh presents in Brideshead Revisited, and in all his works. It is a first for me, and I hope a last. Consequently, I recommend the brilliant pessimism of this film to all my readers, who I hope will appreciate the exquisitely rendered truthfulness of the narrative. As for the unredeemably pleasure-seeking hedonists among you, don’t say I didn’t warn you. On the other hand, nothing is more depressing in these dire times than a steady diet of mindlessly escapist flicks.I liked that line - "brilliant pessimism" Yes, it was brilliant.