After several months of lower back pain, I learned through visits with various specialists that I just had weak muscles in my core. After one week on the ball chair, I'm already feeling like me again! I've also noticed my posture is better overall - even in seating where people typically slump.
The color selection is great. The balance disc comes inflated but I would like to inflate it more. No directions come with it, but looks like it takes a standard sports ball inflation needle. Comes with a warranty.
Very comfortable chair that will fix your core and lower back issues. Purchased one, tried it for a few weeks at home and I'm buying the 2nd one for my office. I saw it first in one of my coworker's place and she loved it. Inflate it to your preferred comfort level and enjoy being sitting down in the most healthy way. The only thing I'd like to see would be the availability of other different colors.
I am very petite, so this chairs fits me well, but I'm certain it would not work for someone over 5'10" or so. I use it for my art work and it helps me balance and keep my back from straining. Love it.
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