I love, love, love this movie and I could watch it over and over again.
After letting go trying to understand rationally the plot and the whole story of the movie I was imersed in this dreamy state of visual wonder gracefully put together by Resnais. Setup, decor, costumes, makeup, light, shadow, artworks, landscaping, indoors, outdoors and so on - everythings adds up to this wonder and higher state of retro-coolness!