I previously purchased a Go Pet Club Cat Condo for our rescue kitty, and I was so impressed with the quality of the product that I wouldn't consider any other brand when deciding to purchase another one.  Our cat is 14 pounds, and flies from the counter to this Cat Condo.  It barely moves as it is extremely sturdy, and our cat LOVES it.  I have purchased similar items from PetCo, Job Lot, etc., but this company makes the best.  You and your cat will not be disappointed with one of their cat condos.