My bengal boys love it and play like crazy. I only use a very good quality of catnip made up of nothing but the flowers. Its called Cosmic Kitty or something like that. On the other hand, Missy could care less and has never liked it. Neither have any of the other cats we have shared our lives with in the past 34 years. Either I wasn't buying good enough catnip or all of our domestic cats were immune to its effects. Kaly and Koby have been our only cats to like it. I use it once in awhile because sometimes they haven't wanted to share it with each other and it makes them a little more aggressive than they already are.
Nan