Comfortable and well built. arms do not actuate back castors were not the best quality so 4 out of 5 stars. Best instructions I've used in a while. Fasteners are separated by number and sizes are clearly marked.
im 5'9" tall and the headrest would hit my shoulders. i had to do the online hack to raise the headrest. another option was to not install the headrest at all. other wise good chair. easy to install.