Purchased the orange & love it for bright my home office/studio
It appears to be well constructed. 
Assembly was very simple (a total of 12 bolts) 
The back is stationary & seems to provide excellent & comfortable support. 
I like the breathable mesh.
If you like to lean back while on the phone - this is not the chair for you.
The seat is fairly deep which is awesome - especially if you are tall.

Pros: Good find for home office.
Cons: May not be heavy duty enough for 9-5 office.