My cat is loving it! He tries out at least once a day to get at least one of the balls out of its slot.
The cats will not stop playing with it! I have 3 cats, two that are loafs and just lay around all day.
We have other toys with the spinning ball, but this is the first one I have seen them play with consistently.
All 3 can and have played with it at the same time! We have had it for 2 weeks and they are STILL playing with it.
These are not kittens! They are 6 and 7 year olds. Wonderful toy!
I tested this brush out on a pet of my couch where my cat lays (it wasn't as hairy as usual from the start since I had vacuumed yesterday) and it was able to clean up the hair in just a couple minutes. I also tried it on my wife's pants after she was sitting on the couch and it was able to remove hair from her clothing.
I have a single level toy similar to this but it is much more heavy duty and does not move when the cats play with it.