Absolutely love it ...have 4 cats... 17 lbs., 15 lbs.,
12 lbs. & 7 lbs. Great purchase for us. Assembled by 2 of our grandsons (older than 15). We attached to perfect windows of our enclosed 
front porch. Cats are in & out every day. We close window to keep them inside at night...may get one more for other side of house...THANKS!