Bests & Worsts Reviews from Amazon

Inflated it up to 65cm. Sat on it for less than 2 hours and it popped. I had a cup of coffee in my hand and was talking to a co-working in my office when the ball burst. Coffee everywhere, cup broken on the floor, me laid out on the floor in confusion. Not pretty. I returned this item within 3 hours of opening it. I'm under the impression that these are cheap China products. Don't waste your money. I weigh 190 and the ball was far from being over inflated.