In contrast to the well-known name in the field of stool, cost of Top Star only a fraction and I can only recommend. After some seating units "familiarization" it sits, believe it or not, very convenient. The back looks after some time at a desk much enstpannter, since the entire upper body is in constant motion during operation. Occurring tensions I do not know since this stool, anyway. Unfortunately I have no comparison to the more expensive stools. But I am fully satisfied.