I think the plot is fun but also generic and predictable. I don't know how I feel about the characters. At times they made me laugh and there were times that they annoyed me a lot. Avery, because she was so naive although it was totally understandable why she couldn't move on from Aiden. And Grayson, because the guy was a total perv even if he was cute and adorable sometimes. The side characters weren't better; their individual personalities were overwhelming and so disturbing. What I really liked the most however is that Kelly incorporated bits and pieces of physics throughout the whole book.
All in all, I guess this is an OK book, though I still liked Kelly's Serial Hottie so much better.