This is a great design. It's lightweight but sturdy. At first i was a little confused about how to attach the roof with the zippers but that was my fault for deciding to jump on putting it together without reviewing any instructions. Even without reading them i still got it together in less than 15 minutes and it can easily be taken apart to store. The quality is great especially considering the price. Very happy with my purchase. Just set it out so im unsure if they'll use it but considering the two outside semi ferals have been making due with plastic storage containers with entry holes cut in i think they'll be super happy.