Roger Ebert's site gives it a glowing review, saying,
Cuaron has made his most personal film to date, and the blend of the humane and the artistic within nearly every scene is breathtaking. It’s a masterful achievement in filmmaking as an empathy machine, a way for us to spend time in a place, in an era, and with characters we never would otherwise.
Rolling Stone calls it a masterpiece. Deep Focus Review calls it "a profound human document and astounding demonstration of high-art filmmaking." Rotten Tomatoes has a critics consensus score of 96%.