It’s empty in here!
We only have rugs but works really well; doesn’t get stuck places and the cats love it! Buying a second one for sure! Only downside is that the batteries don’t last long, but can get in large packs at reasonable price!
It is good, I love that it goes on its own and my kitten plays with a little bit. But it is big and heavy/clunky which I think puts him off. The batteries ran out after about an hour or two which is annoying.
I thought this was great. It rolls around quite quick and doesn't get stuck anywhere thanks to it changing direction. My cats don't really interact with it though they just follow it around.