I would have given it 5 starts. Bought a open box item for the first time. The assembly instructions and screws were missing. The original screws used to assemble the product where enclosed within the product and it was hard to remove it without damaging the product or reuse it .  
For open box items -the website does mention "The item is in like-new condition and has been inspected by our returns department. We make every effort to look for any indication that the item is defective, damaged or will not work."  I doubt that , I would never buy a open box item again and go over the hassle of talking to customer care, returns, repacking the item  etc etc  
The wayfair team did allow me to return the item and I appreciate that !