Ready Player One is a tough book for me to rate since I neither loved it nor hated it.
Here's what I liked: I really enjoyed the overall premise of the book. Wade Watts, a poor teenager with no prospects, spends his entire life inside a virtual world called OASIS. OASIS was created by Halliday, an antisocial computer genius who was also obsessed with 80's pop culture. Upon his death, Halliday created a tournament inside OASIS and promised his entire fortune to whomever won. The tournament included using clues Halliday left to solve enigmatic puzzles, win videogame battles, and play parts in old 80's movies. (For some odd reason this competition reminded me of the Triwizard Tournament from Harry Potter and the Goblet of Fire). Not only is the futuristic technology in this book completely awesome, but it's technology that isn't that far away from our current future so it's truly believable. The story is told from Wade's narrative, and I loved his funny inner monologue.
Here is what I disliked: The first two parts of the book were soooo boring. I understand the need to set a scene and provide back history, but holy cow! It was all narrative with a lot of 'show don't tell' issues. I really had to push through to the last part. I loved part three. If Cline had written the entire book like that, it probably would've been a whole lot better.
As someone who was born in the 80's but grew up in the 90's, the overwhelming reference to 80's pop culture could be hard to read for someone who knows nothing about it. (I found myself knowing about 50% of it). However, the author does a good job describing what Wade was facing, so knowing all of the references really isn't needed.
Ready Player One isn't a bad read, and I would recommend it :)