As a contemporary YA summer fiction, SYBG is mathematically perfect. Girl+best friend(s)+adorable younger brother+nice gentlemanly love interest+a few hurdles= classic contemporary. However, if you're looking for a story with a lot of depth to the characters and a thrilling story line, you might look elsewhere. The story often lagged for me, and I think we could have done with more of certain characters - like Emily's brother, or even her parents. Maybe I've read too many contemporary YA's, but I felt the story was a little formulaic and I kept hoping for something exciting or like a real emotional scene. 
 You know what's going to happen chapters before it does, I guess that's why I kept hoping that there would be some dramatic climax in the story. What if Sloane's parents were in witness protection? What if they were super spies that couldn't ever stay in one place - which might be why Sloane hasn't really been able to get her license - because she has no stable identity! Gasp! That would explain why Sloane decided that disappearing on her best friend of two years was a good idea, because honestly, her real explanation fell super flat for me. I honestly wouldn't have minded if something ridiculously implausible happened because I was that bored. 
 Basically, I found this to be an okay read. It wasn't bad or disappointing, it just felt like a weak handshake. The cover of the book looked really vibrant, and the blurb was intriguing, but the story itself was not memorable. Am I glad I bought it? Sure. Would I read it again? Not really... maybe? It's not a bad book, and I would recommend it to younger readers looking for a nice beach read. I'll just bring along something else. 
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 Also, on a side note - the playlists are definitely worth checking out, I think they were a great add on by Morgan Matson.