I only got to the 2nd step of putting it together and the G1 part couldnt take any pressure and just ripped. It tore like it was dry rotted. There is no way this could have handled my 2 cats. They offered to send me out a replacement part but I just didnt feel like it was worth keeping. I really wanted this for my cats. If they would upgraded to a heavier more durable material and less parts. I would consider buying it again.