More or less it does what it claims.

The unit does provide the instability that activates your core. You have to be particular about what chair you put it on or it won’t be stable enough and can actually hurt your back. The textured top designed obviously to prevent you from slipping can be a bit uncomfortable. I haven’t utilized it as a device to stand on to improve balance which certainly as you age is a positive thing. When I do I’ll update my review. All in all I would say it does what it claims to do.

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