Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Walk "ON" the Pounds!

I own about 15 of Leslie's workouts, and this one is my least favorite for several reasons. It is not challenging; I barely work up a sweat. The music is not well organized, and there are always gaps of silence between songs. But, what bothers me more than anything is that Mary Kay appears to have gained about 50 pounds since the last video. I cannot seem to focus on anything in this tape other than her obesity. Seeing her makes me realize that this exercise program is not effective for everyone. Mary Kay teaches this program, yet she has gained a substantial amount of weight. Seeing her in this video has prompted me to search for new workout programs. Furthermore, Leslie cannot stand to simply walk and allow Mary Kay to lead the second mile. She is constantly doing things behind Mary Kay's back to draw attention to herself. It's very annoying. Finally, poor Mary Kay is dressed in drab gray and black. They could not have made her look worse if they have tried.