I have been cheaping out by giving my cats the free catnip that comes with their scratchpads, so one day out of utter curiosity and also inherent cat parent guilt I decided to purchase the good stuff for them.
It is indeed good. It got them high and stoned. It was very entertaining watching them roll around in it in hopefully what I assume is delight and joy. My smart cat stared into space for hours afterwards. My non-smart cat just started drooling into his scratch pad.
Also, a little of this stuff goes a looooong way.