Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great

I bought this item to use as a chair replacement, which means it likely gets used more often than if for exercise. I bought this items a month ago and have used it almost daily since. To date I have not had to reinflate the ball and it has been sturdy and comfortable. The enclosed pump didn't inspire a lot of confidence but actually worked just fine, and given the fact that it may not require a lot of use, should be suitable for the life of the ball.