Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Works better than anything

This is the real deal. Therre is no exercise better than squats, other than the Olympic lifts to put mass on your entire body. The idea here is to take what you can squat 10 times and try to do 20 in a rest- pause fashion, stopping between each rep to catch your breath. It's more like doing 20 single reps than on continuous set. The reviewers who hurt themselves are not squatting properly and need to check their form. The technique of doing 20 rep squats is no the problem. I would substitute protein supplements for the milk. Milk really doesn't have a great protein content, and that high a volume of milk will be hard on most peoples intestinal tracts. Brush up on your squat form, and give this a try. It should work for most people.