TWEETERIFIC!
I will be 100% honest, my 2 older cats couldn't care less about this toy, they prefer less energetic leisure activities. That said the young cat that has adopted us goes nuts for this toy. The tricky bit was getting it to stick at the right height. With the toy high enough to encourage stretching or jumping to catch the bird, but low enough to take the prey to the ground. It has never detached from the door and the bird is still stuck the the string. Best toy ever, he loves it!