I just saw this Saturday and it affected me in a weird way. I saw an old relationship in it and I'll have to sort out those feelings. So, though, personally for me, it was thought-provoking, I still really enjoyed the film.
If you've seen Eternal Sunshine of the Spotless Mind (another favorite of mine) then this is the movie for you. It's different, like the tag line says, "It's not a love story, it's a story about love."
If all of that was not enough, the soundtrack is incredible too!
I totally fell in love with the character of Tom Hansen, played by Joseph Gordon-Levitt (who I have had a crush on since 3rd Rock From the Sun) and his vintage-like wardrobe. And finding this just about killed me...he can dance!
And Zooey, as Summer Finn, I wanted most of the clothes in the movie especially the dress she wears to a co-worker's wedding (not the one shown here).
Note: In a bizarre coincidence I found out that the dress could be true vintage from Western Costume, which has been outfitting the movie business since 1912. This company featured prominently in two books about movie costume designer Edith Head that I just finished reading. Bravo, costume designer Hope Hanafin!