I bought 2 outdoor lounge chairs at the end of last year. I didn't put them together until the beginning of May 2012.
They were kept under a porch except for 2 parties. During the second party one of the lounges collapsed under a normal weight adult. The legs on the back buckled to the ground. The second lounge had the back crack and the slats come out.
World Market doesn't seem to think that 3 weeks is too short a life for this furniture and will not accept responsibility for selling junk. Let the buyer beware-stay away, far away from World Market.