A very beautiful story. I got really attached to the characters and their respective struggles, especially Eleanor. The back and forth between the two protagonists is quite well done, and allows some interesting parallels. 
 It's funny, reading this after Fangirl, I would have sworn Fangirl was written much later, since the author's style seems to have grown between the two books - maybe it was just my imagination, but Fangirl just seemed more accomplished, which doesn't keep Eleanor & Park from being beautiful either. 
 In any case, I find Rainbow Rowell writes teenagers really well, and the way they experience love. It did get a bit "syrupy" at some points though, and sometimes heavy handed. While we're talking about negative points, I also understand the concerns some readers have expressed regarding the handling of Park and his family. 
 In spite of these few flaws, I enjoyed the read, and got quite emotional over it (which to me is a good thing). Also a big fan of the ending, all things considered.