Excellent "Olde School / Last Century" customer service.  Quality beyond my expected disappointment. Easy to assemble even when you go back to the you tube video to watch assembly AFTER you assemble ...and w finger on jaw w tilted head you think..."somethings just not right".  (I have vision challenges.)  Maybe took 2o minutes to assemble sitting with a break midway.  Durability appears to be that of pvc used in plumbing.  Loved the first one I purchased so much I bought 2 more sets in less than 30 days- Zippity has a wide selection.  My problem was finding availability which after calling the manufacturer for help to locate product they told me they found one...it was Wayfair and it was less cost than my first order from another retailer. Thus resulting in nearly 2k in orders from Wayfair in 30 days.