I received my order just yesterday, so I haven't had a long enough time to allow my cats to test out the product.  However, the very first thing I should mention is that all the mice come with the card board company tag attached to each and evey one of them. That's fine if your selling them individually, but since they are all for my cats it was a bit of an inconvienance. I tried my best to remove all of them, but some of the plastic connector tags still stayed stuck in the mice.  So, since I had to remove all those tags I have to let you know there were only 59 mice in the box. To me this is not a deal breaker, I'm sure the machine that fills the box goes by weight, rather than a physical count.  Well, after all that my first cat completely ignored them.  As for my second cat he's a night time hunter so I haven't seen him playing just yet.