I originally purchased this chair 7+ years ago to use at work, as I was experiencing recurring pain in my lower back. Shortly after I assembled the chair and got used to using it, my back pain went away. Now, I've ordered this replacement because one of the metal pieces holding a knee pad to the crossbar has broken. After using this chair constantly for at least 7 years, I can report that it is well worth the money and is my top choice (I also have one for my personal computer, and my sister bought one too).