I really regret buying this. It slides all around on our hardwood floors. The top is too slippery for the dog to get any traction. This is not sturdy enough for large dogs. I have 3 dogs. The smallest is 55 pounds and the heaviest is 85. It doesn't seem sturdy enough for either. Maybe this would be better for smaller dogs and placed on carpet. I don't know. I took a risk on this after reading the reviews and I really regret it.