Just purchased. Assembled yesterday. Assembly was straight forward but the instructions were not particularly easy to follow. Parts are clearly labeled and includes the needed tool. Took me about an hour (and I'm good with assembling things.) So far comfort is very good but I cannot adjust the seat height yet as the raise/lower pump does not work. (Wayfair arranged for a replacement part to be shipped.)  There is NO lumbar support; however, the rear of the seat back has a zippered compartment, and I was able to add a folded towel in the lumbar area and that seems to work great. 
PROS:  Good appearance, comfortable. Lumbar support can be added by user. Spare parts provided...just in case needed.  
CONS: Defective as delivered but Wayfair shipping new part that I will need to figure out how to install/replace. Indicates lack of quality control. No lumbar support. 

I will update my review (if possible) after the chair is used for a couple months.