Best used when seating is on a hard surface.
It seems heavier (thicker) than I really need, and the dimensions smaller than I expected.  When I sit on it I need to have it on a<br />straight, minimally cushioned chair for most comfort.  Also, it is very heavy to carry when traveling on a train, bus, etc.  I will be<br />having surgery soon, and will probably consider it a godsend at that time.
Rating: 3 stars