Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too tough but fun

This video is only for truly advanced exercisers. The best thing is that it's fun and short. The moves take a little while to learn, but that's part of the enjoyment. Karen is an excellent instructor. I wish she would make more short aerobics videos. Strong and Smooth Moves is her best short one for beginnner/intermediate level aerobics lovers.