I have, looking for a swivel stool, spotted short supply and then I quickly ended up with this stool here. There are far more expensive chairs, but where you can also just sit. Most expensive mimic a Gymnasikball. So one part I already have (too bulky, stinks of rubber, etc). The package is small, some parts to build with a socket wrench together. The rolls also work if the chair is occupied. Have a part where you can not. The upholstery is pleasantly firm. The range of height adjustment is large.
I would buy the stool again. I would buy again from this supplier.