I had been watching for a chair like this to become available at a sale price. It finally did. I had one at a prior workplace and wanted to get one for my home office.
Having back/lumbar issues and now working remotely from home regularly; needed a more therapeutic model. Although I thought a bit pricey (most other brands were on 'sale' at the time so I figure this one must be popular). But other more therapeutic models cost even more. Only one minor issue; could not adjust headrest vertically only the rotating adjustment worked. Simply loosened the mounting screws and used a filler item for the gap for a good fit. Otherwise it's been great.