This is pretty awful that's with the expectation that it probably wouldn't be a top of the line product. The three shelves were easy enough to build and are fairly sturdy. The real problem came in building the litter box. The dowels and screws that were supposed to secure the shelving seem to be too small for what they need to do so the top shelving part is essentially just sitting on top of the litter box enclosure. The idea of taking it apart and returning it was a more miserable prospect than spending all that time building something that was just garbage. So I hammered nails to secure the unit together. It's definitely more secure this way (which is a pretty low bar). Anyway, this is a piece of garbage and I'm sure there are better options on Wayfair.