Very good product for those who tend to poorly stand on their chairs. Having had major back problems, this chair is some part in my recovery. Let's talk about it, it's a bit expensive but it's solid, everyday use at work for 8 months is 7h per day, is impeccable. It will just think tighten screws the first few weeks time the wood "is done." It is also well set the piston which manages the inclination of the chair, if you have too sore knees change settings not to be based on the shins and you should go. Do not stay especially on a first bad impression, this chair change much of our sitting and works the core muscles instead of the column (which is much better!), It will take a little time to accustom week muscles back, after what is happiness (lower end of the day tensions of low back in the early days, allucinant). The rest knee / shin is padded I found, if it hurts your piston may be set incorrectly, the first week it will be doing a little more often breaks to relieve the legs. If the chair is properly adjusted, it can sit several hours without any problems I guarantee you! I recommend! as to the principle of the chair construction.
