Love this product! Super sturdy. Houses are large enough for my 18 to 20 lb.cats and all 4 can jump on it at once with out it tipping. They are between 5 and 11 yrs so it took them a few days to figure out what it was for but now they run all over it like they are kittens again. They scratch the heck out of it and you can't even tell. It is holding up very well. So glad we got this one. Would recommend highly.