Ordered and received six stools. Easy to assemble but the seats on every one were defective. The screws were too short and did not secure the seat to the frame and the seats literally fell off when picked up by the seat - which is how you would normally pick up a stool. 

The repair for the six stools took a number of dollars for the right length wood screws (not the drywall screws the manufacturer used) and 3+ hours to drill new holes for the proper screws (the original holes in the Masonite seat base were stripped) and to countersink the screws. After that the stools were finally sturdy and usable. Oh, and in two of the stools the corner brace through which the securing screw passes was broken and had to be repaired. 

Overall the repairs were probably easier than disassembling the stools and returning them for a refund. However, we should never have had to decide to repair versus return - Wayfair, shame on you - six out of six defective.