Against its obvious inspiration, Jacques Demy's wonderful The Umbrellas of Cherbourg and The Young Girls of Rochefort, Jeanne and the Perfect Guy pales badly -- the songs written by co-director Jacques Martineau and Phillipe Miller are several leagues behind Legrand, and the whole shebang comes nowhere near the same heights of giddy romanticism and bittersweet melancholy that infects Demy's masterworks. It does, however, come close enough to be worth watching for anyone who enjoyed the recent re-releases of those two films. It's also anchored by a wonderful performance by Virginie Ledoyen  as the sexually carefree Joanne.
P.S. I have a quibble with the film's title. I don't know what "garcon formidable" translates exactly to in English, but wouldn't Jeanne and Mr. Right work better that the rather clunky title it has now?
The Most Beautiful Woman in the World[TM].