These are comments and feedback from B4Play users.

I was very impressed with the B4Play ball as I have had the injury Plantar Fasciitis.
I used it for 2 weeks before the Hong Kong marathon and my feet definitely felt better after using it. The fact that worried me was the pain of my injury after the marathon and surprisingly I had no pain at all with my Plantarfascitis.

This is amazing. It is better than any cream or remedy for my acing and burning feet and the bonus is that it never runs empty!