General consensus seems to be that The Road, starring Viggo Mortensen and Charlize Theron, doesn't quite have the same punch as Cormac McCarthy's Pulitzer Prize-winning and awesome novel.
"...it'll leave you exhausted, emotionally spent and with much to ponder."
— Peter Paras, E! Online
"The Road evokes the images and the characters of Cormac McCarthy's novel. It is powerful, but for me lacks the same core of emotional feeling."
— Roger Ebert, Chicago Sun-Times
"...a faithful but pale imitation of a film adaptation..."
— Ed Gonzalez, Slant Magazine
"...The Road, for all its vivid desolation, remains a curiously unmoving experience..."
— Owen Gleiberman, Entertainment Weekly
"The Road honors McCarthy's book with haunting pictures of the future's end ... but they tend to overwhelm the drama in the fore."
— Scott Tobias, Onion AV Club
"The only purpose I can detect in the smoldering wreckage is simple masochism; some people like to take a beating and others like to spend two hours cloaked in the most piteous distress. File The Road under apocalypse porn. Unlike Wall-E and Children of Men, though, this one offers no hope of renewal, no exit from the hell it so persuasively depicts."
— Kyle Smith, New York Post