This is a really great read. It made me laugh, out loud at times. Good thing I was at home at the time!
My only disappointment is that I was able to guess the "mystery" way before the reveal. Then Julie's indecision about how to feel / what to do about Matt after finding out the truth was a little annoying. How could she think that Finn's "character" on Facebook was not part of who Matt was? Did she think Matt was trying a different persona on her? Then all of a sudden she decides that, of course it has been Matt all along. I would have liked to have followed more of a thought process so that the reunion would have been more poignant and tender. Instead, their make-up scene had a more "make-out" feel to it, which kind of detracted from their love.
Overall though, it was a very good book, and I highly recommend it.