I saw The Road this weekend. Having read the book I was watching the film looking for deviations from that story. And I have to admit that they did a remarkably good job sticking to the events in the book, capturing the feel of the book, and visualizing the setting. The acting was fine. The scenes that were supposed to hurt did hurt. The pacing of the story seemed fine, mixing foreshadowing, overwhelming dread, hopelessness, and desperate action scenes well.
There were two major differences between the book and the movie, that I don't not feel hurt the movie at all. One is a missing scene (that I would prefer not to think about in order to describe) and the other is a change to the end -- giving it more hope than the book provided. Which was nice, really, since neither the book nor the movie suffers from a dearth of hopelessness. So having something good to latch onto is welcome.
I'm giving this a thumbs up with the caveat that this is not a "feel good" movie. It is a very dark, post apocalypse movie that was fairly faithfully adapted from a very dark, post apocalypse book. Look for it on DVD or find it in a small independent theatre if you like the genre.