She had been asking for a exercise ball to use at her desk, but was afraid of not being able to move between desk and file cabinets.  This solved the problem.  She has had it for about four months and would not go back to a regular chair.  The proof that she wouldn't switch -- she moves it from room to room so that she has the use in any meeting throughout the complex.  It was shipped quickly and only took minutes to assemble.  It was a great value compared to several other brands.