Just saw this film in NYC, there was also a Q&A after with the man himself after.
I found the film to be a beautiful portrait of someone's life, and how the people around them are affected. Michel said in the Q&A that he wanted to give his Aunt some visual record/history of her life, and this film goes to show that you don't need to create a Hollywood fictional character, real people are just as interesting and entertaining. Gondry uses a mixture of visual formats to illustrate the documentary, from super 8 to his well known stop motion. This adds a richness, and a historical depth that works within the context of the film. The film is emotionally moving at times and also humorous. The film is simple and enjoyable, one that does not need to be taken too seriously, yet carries tones of a maturity in Gondry's work that is often not always so prominent.
Go see it!