This was really easy to put together and only took about half an hour. I actually mixed two colorways together because I wanted white but the gray shelves matched my cabinets perfectly so I used pieces from each the all white unit and the black metal with gray shelves unit. One was missing a set of screws but I contacted customer service and ordered/received replacement screws pretty quickly (I wanted a complete set to donate the remaining mixed unit to a thrift store). No complaints.