Bests & Worsts Reviews from Amazon

I have been considering this purchase for a while, and decided to spring for it when the price dropped. I am a musician and am very conscious of body alignment -- I do yoga, Pilates and Alexander Technique to maintain my body for playing. My old desk chair was not allowing me to sit truly well, and this product does. Sitting on a ball is great by itself, but the wheeled base allows it to truly function as a desk chair -- for instance, to roll over a few inches towards the printer, or rotate around to the other part of my L-shaped desk. I don't miss the arms at all. I am usually typing or writing when sitting at my desk. The chair is very comfortable and was very easy to assemble. You should know that the manufacturer cautions against leaning on the back rest, called the "support bar;" it is for "stability during the exercises." There is a booklet included that shows a series of exercises using the ball both on and off its roller base. There are locks on two of the casters for use in doing these exercises. My caveat, which does not reflect on the quality of the product, is that the ball is too small for me to use off its base. I am 5'8", and use a 55 cm ball. I did not see the FitBall product, which uses the exact ball I like for exercise, and I probably would have purchased that if I had, so I could store my ball on the chair. I may yet; this chair is an acceptable height for my computer keyboard, but rather low for the other part of my desk.