This is a solid little piece of furniture. It didn't take long to put together. However, some of the screws came to me without threading, and a dowel was broken. They provided enough backup pieces to ensure it could be constructed though. Some of the guide holes were also not drilled into the parts, so the feet were estimated.
Other than that it is fairly solid and my cats both like using it. In fact they prefer the box in the enclosure over the open one in the room. It has been easy to maintain and clean in the week that they have been using it.