WalMart has been selling these for quite some and I bought one there after seeing it on TV. My boys use it, but not exclusively. Toby likes it more than Havoc but he really prefers the cardboard scratchers anyway. Havoc will paw at it if I put the catnip on it.

These scratchers do help with the claws, but not as much as they claim. I trim my boys' nails monthly and the scratcher does keep the very tips from being pointy but the nails still grow long and require trimming. But, like I said they don't use that particular scratcher exclusively. They really like their tall posts I bought on the internet.

Have you tried a scratching post with the type of carpet they prefer? My guys like the loopy carpet, so I bought some small berber-looking kitchen rugs and attached them to an existing scratching post with some giant zip-ties. That way I can just replace the small rugs rather than the whole post when they wear it out. I rub a little catnip on it or use the spray everynow and again to keep it "fresh"