I bought these to help me get back into shape after having a baby. I figured I could fit in eight minutes at least a couple of times a day. I am so happy I bought this set, it is great! Sometimes I will add one or two of the workouts to my cardio workout, or sometimes I will do all four in a row. The exercises work and I love the format because there is no irritating chatter. You have eight minutes and the instructor gets straight to business and works you straight through those eight minutes. There is an optional eight minute stratch that you can do on each of the DVD's if you need it. Also, the time counter lets you know how long you have for each exercise and counts down the eight minutes, which is very motivating. I HIGHLY recommend this set of DVD's to anyone looking to firm up their body and especially to new moms.