At first I thought this was a pretty nice shelf. Well, 5 months later it has completely fallen apart. The metal things that turn and lock onto the metal bolts slowly loosen and become ineffective at keeping the shelf together. I am super disappointed! At first it was only one little box that had problems, so I chatted w Wayfair to request replacement parts. They didn't arrive, and now the entire thing won't stay together. I am going to try to request a refund, as no one buys a shelf and expects it to stay together only 4.5 months.