Instruct: Classify the given Amazon review as either positive or negative.
Query: High Impact

I love this workout. My only problem is the fact that it is only 20min long. By the end of the first workout out, I'm always left wanting more, so I combine two. Even though each workout is 20min, by the end of each you are sweating...alot!It is very effective. This is one of the first kickboxing workouts I have done, that actually makes me sweat!!!