The shelter is well designed with many thoughtful features. The quality of the shelter material is very good. The awning on the front entrance and the back escape entrance are very clever. The front entrance has a clear plastic flap for the cat to push through and provides a small barrier to cold outside air. I couldn't see the clear flap from the photos on Amazon. I appreciate the easy opening lid that gives you access to the interior. I introduced the cat to the shelter slowly. I placed her inside once with the heated mat and closed the lid whereupon she groomed herself and she walked out the entrance. The next time I put her food bowl in the shelter and left the lid open. The third time she ate from a food bowl next to the shelter on a cold morning and she strutted into the shelter after eating. Introduction successful!I found the velcro attached to the top inside of the shelter a little short. I couldn't wrap it around the top of the internal frame to secure it. At least I think you are supposed to do that. I will pick up additional velcro from a store and create an extension.