I read it last week. While I enjoyed it, at times it seemed almost like a Da Vinci Code of teenage scifi, and sported an enormous namedrop of culture pop memes for advancing the plot...
I liked all the 80s movie and video game stuff in the book. Though I think most of it would have been like ancient history, rather than pop culture, to the teenage readers the book is aimed at.
I found the weakest parts of the book to be the endless nerd pop culture references. The parts that dealt with the consequences of VR, identity, and withdrawal from society were great, but it felt like it was all wrapped in a self-conscious veneer of "hey, you recognize this nerd reference, right?" as if the author felt that the ideas couldn't stand on their own.