This is undoubtedly the weakest of Savage's books. (Savage Love does exactly what it says on the tin; The Kid and The Commitment are more personal and thoughtful.) It's still an enjoyable read, but rather forgettable.
In response to neoconservative tomes that decry modern America as a immoral sewer, Savage sticks up for the sinners and points out that, hey, America's not so bad, really. He does this by tackling each of the seven deadly sins -- visiting sinners' hotspots and profiling people who commit the sins (swingers, pot smokers, etc.). The trouble is, Savage's findings are not particularly revelatory. There are some nice insights (especially as Savage recognizes the real charge he gets from gambling or finds out he's actually really good with guns), but nothing groundbreaking. The hardline conservatives are never gonna read this book, however persuasive Savage's arguments are. Preaching to the choir always feels a bit pointless. It basically has the quality of, "oh, my last book did well, so I should probably write another one, huh?"
A good, engaging read that fans will enjoy, but pick up The Kid first.