Super easy to assemble, just attach the back. 2 large hex screws and 6 smaller hex screws. They give you a few extra screws, just in case...
After unboxing, I was sitting on it in 15 minutes.  The gray was reviewed by others as puple-ish, and I was prepared for that.  Mine was really just a cool gray as opposed to warm that others were hoping for. The cushions need airing out, there is a chemical smell. It's going to work great on my patio this summer - and beyond!