I previously purchased this same unit from another retailer and decided to get a second one.  When it arrived from Wayfair, it was missing the hardware to put it together (however, Wayfair sent the replacement parts right away).  Today I put it together and two of the shelves split as I attached the screws (not over-tightening, just putting them in!).  It almost makes me wonder if it was a "second" quality unit, given to Wayfair to sell at a discount price.  Don't waste your money.