It's like Marmite - love it or hate it!
I bought these for my 2 cats after they showed no interest in catnip toys but went crazy for my valerian containing tea bags! One of my cats, a Ragdoll kitten, showed no interest in it at all. I was disappointed until my other cat, a Tonk, went absolutely crazy for these! She threw it around and played and eventually fell asleep cuddling it like a teddy bear. After a month it stank horribly so i will be buying more as a treat for my Tonk.