I purchased two of these blue shelving units in October. The shelves were well packaged with all the pieces included. You will need a rubber mallet to fully lock down the shelves into the frame.  Assembly took maybe a half hour at most per unit. With the wood shelf bottom installed, the unit is sturdy. I am replacing my existing plastic shelves with these shelves. I am in the process of ordering more. The price here is the best I have found for Heavy Duty shelves with the high weight capacity per shelve including free shipping.  Only thing I wish is that additional shelves could be ordered in addition to the five that are included.