The chairs are sturdy, comfortable and easy to assemble. They do require oiling which takes about 20mins per chair, and is best done before assembly so that you get oil into all of the covered areas. 
We ordered 2 of them and both came out of the box with damaged front slats on the slide-out ottomans (the screws had ripped out of the beam underneath). This slat is the most likely place you would hold the chair if you carried it someplace else so having this slat damaged is more consequential than other slats. We repaired them by putting longer screws in place but there is obviously a design weakness. 
Can't comment on the weatherproof-ness yet.