I have practically every exercise DVD ever made; I have to say this is the one I grab; especially if time is limited (if you are in a hurry, skip one set) This purchase was well worth the money and more! The reviews I read prior to purchase made me reluctant to purchase, but I took a chance and am glad. Who CARES if the models are smiling or not?? They have incredible bodies and that in and of itself is motivating! If your butt improves instantly (which it will), does it matter who is smiling?! Each section is three exercises, and each is done in three sets with a stretch after each. If you have limited time skip a set, but don't skip an exercise. You won't be smiling when you're done working out, but once you look in the mirror you WILL be! Easy to follow workout. Could have been laid out better (exercises lying down, jumping up, then down again), but it's a minor annoyance.