Shipped quickly, and the chair is well built; fairly easy to put together (as long as you can read "international pictures") and the thing is comfy.
The lumbar pillow is good, but the massage feature is is underwhelming.
The only other critique I have is that it's very low: the lift should raise the chair another 2 inches/5cm to be on par with proper office chair heights.  I may look into replacing the piston with a taller after-market product, but ideally, I shouldn't have to.