I was just going to buy Monopoly, but I saw this and had to buy it instead. For the most part, it is like any other Monopoly game, but instead of buying streets, you buy different cat breeds. The title deed cards contain facts about your chosen breed, which I think makes the game more interesting. There are also a few rules that are slightly different, although you can ignore these and just play by Monopoly rules if you wish. I'd say it seems a little bit more cheaply made than Monopoly, but the quality is still perfectly reasonable.
I recommend this to my fellow cat lovers!