Overall, a great chair. Easy to install, comfotable and very good for my back. I've noticed recently, however (just after the point of return!) that it now simply deflates without me touching the handle to reduce the height. It just slowly lowers me to the lowest position from fully up. It's so frustrating, I'm going to have to get rid of it and find a better alternative. So close to being the perfect chair. P.s...I'm about 70KG in weight, so don't feel that's the issue!