You could pick any major newspaper/blog/podcast and find a kind interview/review - e.g. http://www.guardian.co.uk/culture/2011/may/07/jennifer-egan-life-goon-squad
This is a heavy-going but exhaustive interview by Heidi Julavits: (worth reading if you enjoyed the book!). http://bombsite.com/issues/112/articles/3524
The author also happens to be tweeting a new story this week, 120 characters at a time (more info. on this in Wired - http://www.wired.com/underwire/2012/05/jennifer-egan-black-box-twitter/). Most critics seem to be sceptical about this, which is striking because most were very positive about Goon Squad.
Also, as a refresher, here's a list of the main characters in each chapter: