I did a lot of shopping before I bought this item.  It was much more expensive ($229) than comparable items. I made the decision to go with this item because I have senior cats and it had the lowest entrance point.  However, I am returning the product because it has a VERY TOXIC SMELL.  If you are at all sensitive to smells; for example if you have migraine headaches or asthma, you'd best avoid this product.  (Not to mention, cats also have sensitive respiratory systems and I would not want it around them.)   It's not right that I had to pay $11 to return this product, but it's worth it to get it out of my house.