Instruct: Classify an Amazon review into positive or negative sentiment.
Query: A challenging and motivating workout.

As someone who works out regularly and is not overly-challenged by many aerobic videos, this one came as a pleasant surrpise. This workout is fast-paced and leaves little time for boredom. There are five "active intervals" comprised of vigorous but easy-to-follow moves and five "resting intervals" that focus on strength training. This tape would give beginner and intermediate excercisers something to aspire to and offers an energizing workout to those that are advanced. I often combine this with other tapes, adding a bit more cardio and weight traning. Also, the abs section at the end is quite short (althought it does target the major muscle groups), so you might want to add a few more crunches. By the end, you feel that you really worked your entire body. For the price, I recommend it highly.