Got this ball to do exercises on at home, it's great. the pump that comes with it is quite good compared to others that come with hand pumps - gets a bit tricky once their ball gets full and the air pressure bites back but it's manageable pumping it. Once pumped up, it looks like (or even better than) a ball you'd find at a commercial gym. Leaves no marks on the floors and is very robust. haven't felt like I was pushing any limits on this with using it from a weight perspective.
kids also love playing with it, so keep it away from breakable things
I used a ball during therapy at the gym, but wanted something more convenient. This is great -- and it comes with a pump. I was tentative at first, but now I'm bouncing on it and doing my exercises quite comfortably and confidently.