Cats are like children - you buy them super expensive fancy toys and they much prefer the cheap simple toy or the box it came in!
My cat has all sorts of play cubes, racetracks and scratch posts that are ignored but these mice are his absolute favourite plaything. He will bring one to me, drop it at my feet and miaouw until I throw it for him. He can continue this game until he's exhausted (usually I'm exhausted first). The mice are small enough for him to carry in his mouth and I think that's the key thing. Other toys are too big for him to grasp and carry. Highly recommended.