My cat loves this cheap self-groomer

Last year I posted a video to Boing Boing of a young cow enjoying a rotating brush called the Happycow. I wrote, 'I think my cats would go for a Happycat.' It turns out there is something similar - the Self Groomer Cat Toy. I bought one. It's a plastic brush that you fill with a pinch of catnip (included) then attach to a corner with double-sided adhesive tape (also included). I tested it out on our cat. She was sleeping in another room, and I carried her over to it and set her down in front of it. She ignored it and started to wander away, so I picked her up and rubbed her cheek against the plastic bristles. She immediately caught on and started rubbing her head against it and purring like crazy. She uses it multiple times throughout the day.