I like the positioning, but the knee cushion is too hard and seriously hurts both of my shins, so I have to keep one leg misaligned (due to an eight-year-old shin bruise), thus contorting my posture and causing significant shoulder pain.

It's design also lends itself to many creative sitting postures that aren't exactly as designed, but works great

All in all this is a great option for lower back pain, or to promote better posture.

I have one at the office and at home, and I can vouch for the chair's sturdy construction, quality materials, and effectiveness at training the body to sit in a manner that not only prevents many health issues that result from prolonged periods of sitting, but improves concentration (due to proper posture) and self-esteem while it improves one's posture

When sitting in this chair it's more uncomfortable to slouch and have bad posture than it is to sit upright

Fair warning, though, if you think it will magically correct your posture, that's not necessarily true.

But hey, I'll sacrifice that for better posture and a stronger core any day!

I feel that my posture is much better when using this chair, however, I have only worked up to using it an hour at a time.

and I have noticed when I stand, my posture is actually better.

Very good chair for back pain and good posture

It has helping strengthen my back and improve my posture

My posture has improved and people have noticed the chair.