As a huge fan of the movie Gigi starring Leslie Caron, I had very high expectations for the musical revival. Overall I was not disappointed.
Vanessa Hudgens is adorable as Gigi; she displayed enthusiasm and amazing talent in acting, singing, dancing. She was the whole package.
The characters of Mamita (Victoria Clark) and Aunt Alicia (Dee Hoty) were played brilliantly and much more rounded out than in the movie. The scenes when the two performed together were hilarious!
Honore was played by Howard McGillin who did a good job, but did not quite manage the joie de vivre of Maurice Chevalier. Of course, when one watches the movie today there are kind of creepy lecherous aspects to the character which I am sure the modern actor is trying to avoid (for example the signature song Thank Heaven for Little Girls is sung by the women here, not by him).
The biggest disappointment was the performance of Corey Cott as Gaston. He's a good physical actor, and can sing well, but his performance was rushed and not quite believable. Some of the important speeches he spoke as if he couldn't wait to get finished.
Most of the differences between the movie and musical were logical and interesting. Mamita has a job, we find out what happens to Liane after the "suicide", we see more of the development of the romance between Gigi and Gaston...the only change I believe did not work was the "It's A Bore" song, where they tried to change the entire purpose of the number - instead of Gaston being bored with everything, he is fascinated with engineering and flying machines, and is only bored by everyday things - they should have just done a new song, because the rework is weird.
So, not perfect, but definitely worth seeing!