Good product, great for strengthening core & improving balance, came with very nice & helpful workout folding poster. Ball was tricky to pump up, takes two sets of hands (for fast plugging) and your own better quality pump (the flimsy plastic one it came with was ridiculous and didn't work.) We just used a mini compressor, but even a bike tire pump would do if you don't have a compressor. Very happy with it & glad I have it at home to improve on my balancing issues in-between gym days.
I really love the weight ball is easy to travel with. The accuracy of the weight and size is perfect for core/upper arm toning anywhere you are (work, park or home).
The weighted ball is simple as well as practical!