I was very excited to receive this product, but quickly became frustrated while putting it together. The smaller portion of the legs do not screw into the longer portion because the angle of the legs do not seat properly into the shelf no matter how I position them. And the double screw ends that are supposed to attach them together are too short and won't catch or take hold so that it cannot be assembled. I tried just letting it stand on the three longer portions of the leg without the shelf base, but it is unstable and falls over if the cat tries to jump up on it. I am very disappointed with this product and frustrated that I may have to repack it and send it back. Not worth $150, sorry.