Love this shoe rack! I bought two and stacked/connected them together. The piece to attach them together is included. They are stable and hold my adult shoes as well as the shorter kids' shoes without any of them falling through.  Fits perfectly in my small mud room. Very happy with this purchase.
They went together pretty easily. The first couple of screws that went in were a bit of a struggle to do alone - having another pair of hands would make that easier. After that they were easy and went together quickly.