Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I should have read some of the reviews before purchasing

As a novice physio ball user, I was hoping that by purchasing this video I would become a little more adept at using my ball. I was expecting a challenging, yet instructive dvd where I can both learn the basics of using the ball, and at the same time, challenge myself. The workouts (if you can call it that) were very slow moving, boring, and not in the least challenging. There is a segment in the dvd where you can select a more "advanced" workout. Eager to get a real workout, I was greatly disappointed because the so-called "advanced" portion of the dvd was a few sample snippets of another workout DVD. Very disappointed with this purchase. This workout is a joke! Buyer Beware: If you are looking for a challenging, non-geriatric core ball workout DVD, you may want to skip this one.