I have never been a big Black Keys fan: I have always been more of a fan of the bands they borrow from, such as the White Stripes and the Arctic Monkeys. So when I gave this a chance I realized they were right on par with their alt-rock relations, and truly had the ability to rock. It has all the blues charm of Brothers, while being far more fun and unique. It uses "hell" a few times, and uses some violent metaphors, but it's good fun, and should enhance appreciation of alt-rock.
After another listen it will probably be five stars! :)