Very well thought out, easy enough to put together. However, I have noticed now that I'm using the stool and moving myself around while sitting onto it, the adjustable seat shaft turns independently of the base and often necessitates having to get off the stool and manually readjusting the seat height. There is a clamp device that I've tried increase the clamping pressure to a maximum without causing breakage; however, when the seat and base move in opposite directions it still causes the seat height to get less and less. I wished there was a way to lock it there was a way to lock it in place until the was need to voluntarily change the height. I was a little disappointed there are no directions on the operation of the stool after it is together.