Great for lazy kitty moves. It crawled under the heater for the first few minutes, luckily I was able to pull it out by its tail, so until I figure out how to look for a bug I'll have to make a laundry basket for the floor. My cat gets bored very easily with predictable movements, this messy thing is great for waking up little hunter in a fluffy ball. Update: so first day he was strong, second day he was hard to roll over and caught him. on its own tail and hums in circles. On the third day (today) I took the tail off and it still doesn't climb but runs in small (about a foot) circles as I built box barricades on the first day to keep it from migrating to the other side of the house. So I think its performance depends on battery power, don't think it's a cat as it's still getting used to it and running away as soon as it touches it. The cat is still crazy about it and pulls it to me to turn it on. If you have any questions or found this review helpful, let me know.