Cool idea but not worth the price
In theory, it's a really great idea. Unfortunately, the ball is so hard that when it bounces, the impacts are so loud it sounds just as bad as hitting the floor with a hammer. It scares off several of the cats.
There are three different modes, but all of them involve bouncing. It would have been nice if you could set it to just roll.
Poor battery life.
After 10 minutes, it automatically goes into sleep mode for 30 minutes. Handy, IF it could manage more than just 2 cycles before the battery needs recharging.