We got one of these in a gift bag from a local pet store. It immediately became the favorite of our cat Rupert. Rupert loves to hunt his flower, flinging it into the air and chasing it around. He even brings it to us as a trophy at bedtime.
We just went through our 4th, because Rupert is also destroyer of toys. (They've lasted about 6 months each - pretty darn durable in Rupert land.) I bought a bunch more. He's never loved a toy so consistently.