It is comfortable but makes noise on the floor when you step on it. Perhaps it would be better on carpet and not on the floor.

Good for the use I want it for (under the desk on carpet) stable simple does its job, I would like it a bit taller

It has a 2-level height adjustment and the plastic is of good quality. It is probably more convenient on carpet or rugs, but on tiles it tends to slide a lot, resulting in it constantly moving forward and leaving marks on the wall above the baseboard. It should have a soft rubber on the bottom to keep it in place on tiles.