Got this in today. Unlike other reviews, I had no issue zipping it together. My only issue is I had a crease in the top panel as if it had been crushed, but there was no damage to the box. Got it zipped and the heating pad in, in about 2 minutes. Set it up and let my flame point look at it. She didn't want to get in so I set her down. Within 5 minutes, my other cat Eselin, who is a chonky donkey at 12 to 13 pounds was inside and had taken over lol. Easy to use controls. Power button turns it on, the heat button lets you set it to 6 levels, and the timer is either set to on or 2,4,6,12, or 24 hour timer. Besides the crease spot, it seems well made and my one cat immediately took it over, so might buy the smaller one for my flame point. Mine was slightly different than pictured. It had a black tag to the side instead of the brown one, and my opening was larger and more oval.