I'm really enjoying Superman Unchained, even more than I expected. Issue 3 was the best issue yet.
For much so that I wrote up a piece (backofthehead.com) on the most intriguing thing to me about this Superman story Scott Snyder is telling and how much more I want to know about the Untold History of The New 52.
I have not read them. But, my wife is working through them. She's not a big reader but seems to have really gotten into the books. And, I know several other people who have really, really enjoyed the books.