Sturdy construction as seen in the photos. The sieve is convenient for cleaning using only sand. Not suitable for pellets. My cat still hasn't gotten used to the door. It looks nice in the space. It requires a little attention to the hooks on the right and left because sometimes they come off during fastening. Also, I feel the fastening is hard and I'm afraid they might break at some point, although they seem relatively sturdy. We'll see. Overall, I recommend it.