Very good seat
Easy assembly, few parts and everything fits perfectly without effort. The little extra is the fabric gloves provided.
In use, you sit comfortably as long as you stick to the back. The foam is hard but it is made to support heavy weight over long periods of time (for my part, telecommuting). The adjustments are easily accessible.
There is a removable neck cushion which is perfect.
I don't see how you can support the kidney cushion, it's far too big. Without the cushion, the lumbar region is already well supported.
And for the colour, everyone told me that I stole Darth Maul's seat... :)