It smelled very chemically bad coming out of the packaging, and my cats didn't warm up to it for over a month. They like it now, but it's so light and not very secure to the base that it kind of destabilizes and rolls over when they are trying to scratch it. It seems like they sissiled a big styrofoam ball, and popped it onto the lightweight base without any stability. Very wobbly, my 16 pound boy actually pulls it over the top of him and kicks it with his back legs, attacking the entire thing. I would have given 1 star or less because it's so lightweight and not made very well, but it's pretty funny to watch them knock it over and attack it. For the price, it's not worth it.