Fantastic book! Lots of fun, with great 80s references, as seen from a dystopian future in which most of reality has been supplanted by the far more pleasant world of OASIS (a VR interface). This book will appeal to gamers and fans of 80s pop culture.
There were a few moments where I felt like some elements of the story were being brushed over (without giving away too much, there were some deaths that I felt were not acknowledged much in the text, though this is completely in character with the POV character's detachment from reality). But these were powerful elements that might have been more character-defining and perhaps might have demonstrated more about his motivation. This is why I could not, in good conscience, give the book the 5 stars. It could be just my own personal preferences coming through. Some people might be totally fine with that.
I listened to the audiobook version, narrated by Wil Wheaton, who does a great job with the characterizations and is completely believable as the first-person narrator. Not only that, but it really sounded like he was enjoying himself while narrating the book. And of course, that always makes it more fun as a listener.