I once made the mistake of acquiring of of those seats after I broke the legs off my original bench and hit the floor during a frenzied improvisation. However, I stopped using it because it moved and made noises. I suppose light creaking wouldn't matter on stage in a big hall, but in the house at close range it interfered with my recording. They are also too expensive. I replaced mine with a ordinary, very cheap wooden stool, solid and stable, and it suits me fine. If only one or two people are going to use it, having height adjustment would not seem to justify the wobbles and noises.