I bought the green chair.  The screws are located under the bottom of the chair.  One of the screws was on so tight, I could not finish disassembling the chair.  I called customer service and a week later, I received another seat bottom with a separate set of screws.  SO MUCH BETTER.  Once I got that out of the way, took me less than 15 minutes to get the chair assembled.  Attaching the seat back to the seat bottom was a little tricky, but once I was able to put in 2 screws halfway, I was able to insert two more and tighten them all together to fit.  I love my new chair.  They need to ship the screws in a little bag.  It would make the process so much easier.