Sadly, only half-good, says Bethany Jean Clement:

Half of this movie is marvelous. The idea of Meryl Streep playing Julia Child is manifestly fantastic, a loop of genius, and the reality surpasses the idea. In order to play Child, Streep ate Kermit the Frog: The voice—the chortle-yodeling, the vowels (my god, the vowels)—is perfect. Streep's physical embodiment of Child is perfect, too, both ungainly (Child towered, thick through the middle, over almost everyone) and graceful. Streep as Child is funny: The moments in which she masters, effortful and joyous, the art of French cooking at Le Cordon Bleu are comedy nonpareil.

Read the whole thing HERE.