Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Purchase

I'm always a bit skeptical with exercise DVDs, but this one has been the best I've purchased. Each 10 min workout is strenuous- making the entire 50m workout that much greater. Have definitely noticed more definition in my legs and arms. Highly recommend w/ the caveat that you need to use the DVD at least 3x a week for results (like any workout).*Great to do on its own, or add a couple of the 10m workouts after a cardio session