The design is great, Very poorly put together, miter corners broke when opening the lid, the little house fell apart during the first night my chinchillas were in house, the tray does not fit well and the front of the tray is very flimsy. the material that was used is not durable enough. the chinchillas had a large part of it chewed up by morning, there is no latch on the lid. there is no place to hang a water bottle, most small animals use a water bottle. The ramp does not stay on it fell off the first night. I would not recommend this cage for animals that have teeth. might be good for reptiles. I for see my chinchillas chewing through it within a few weeks. For me to continue using the cage I will need line the inside with small cage wire to keep them from chewing their way out. I was very disappointed :(  Not worth $150.00.