I purchased two of these shelves and assembly was relatively easy.  I damaged one piece during assembly and called Wayfair about how much a replacement piece would be.  They directed me to the manufacturer who shipped me a new piece at no cost!  Very good customer service.  Shelves seem sturdy.  The instructions say to limit weight to 15lbs per shelf - I was looking for this info when purchasing and couldn't find it, so perhaps it will be helpful to someone else.