4 stars for the actual story and concept, 2.5 for execution...so 3 stars total seems about right. 
 Eggers' world of the Circle, a Google/Amazon/Facebook-like conglomerate, is a fascinating and terrifying one. The scariest thing about it was that the people working within the Circle really believed that what they were doing would change the world for the better. I'll let you read to find out just how the trajectory of the Circle's actions goes, but it's unsettling stuff. I can't imagine how fun this story was to write, and you can tell Eggers had a lot of ideas on the subject. He effectively portrays the gradual pull the internet has had on us and the ways in which we are becoming more and more reliant on virtual validation. The "fakeness" that comes out on social media was also really well done. 
 My biggest gripe was with the seeming lack of an editor. This book was all over the place and probably could've been better if it had been scrapped to half the size. I don't care how great of a writer you are, it all comes down to the editing. The Circle was repetitive and long-winded at times, and the main character of Mae got lost in the details. There were plot deviations that didn't seem to add anything to the story that wasn't already there. 
 That being said, I was highly entertained and am looking forward to seeing how this is portrayed as a movie. If you're looking for another scifi book on tech-takeovers and the privatization of every aspect of our lives, try Feed by MT Anderson. It's like the Circle fast-forwarded a hundred years and it's awesome.