My cats love playing with these toys. When the catnip loses its potency, I just refill the toy with new catnip. I don't have to keep buying toys that lose their effectiveness after a couple days. They last a long time. I've had a couple of these for two years and they still are holding up well.

Pros: Less wasteful

Cons: None

My cats love these-my male cat carries his around for hours-playing and just carring it to show people what he's got. I also like the fact that you can open it and refresh the cat nip at anytime without destroying the toy. They seem pretty sturdy.

Pros: cats love them

Cons: none that I can think of

We have 5 of these mice. My wife grows fresh catnip and these toys are so easy to refill and with fresh cat nip added it truly makes our cats so crazy they have to have 1 for each to prevent spats!

Pros: Refill catnip as needed, soft and easy to carry

Cons: none