We just completed installation of the playset.  A few parts (a few bolts and nuts and two metal links) were missing.  Sent an email to customer service overnight and followed up with a phone call the next day.  They couldn't have been more responsive.  The parts were delivered before noon the following day!  
The product is very solid and stable even with a good-sized 6th-grader swinging as high as he could.  Our four-year old child with Down's Syndrome is already able to swing, climb onto the elevated platform by stair and rope ladder, and use the slide unassisted.  Can't keep her off it. :-)