Even with the safety and mechanical issues mentioned by other reviewers (thanks for the heads-up!) my cats love this toy. When mom is too tired to play, it's a big help!
I always make sure to turn it off with the string hidden, so it doesn't end up getting chewed off!
If you are looking for another automated toy that you can leave on when you head off to work, check out FroliCat DART TR1 Automatic Rotating Laser Pet Toy on Amazon. I've had mechanical problems with it, but my younger cat, Griffin, LOVES it! She begs to have it turned on, and she talks to it! Big plus - you can set it to stay on for 5, 10, 15 or twenty minutes! Great for animals with separation anxiety!FroliCat DART TR1 Automatic Rotating Laser Pet Toy