Cats react very differently to the cat wheel. Some, especially kittens, take to it right away. Some learn to race like the wind and really enjoy it. Some like it and then get bored; some are too leery to even try.
Forrest started out very leery of it, but we worked gradually to get used to it, just playing around and on it so he got used to the fact that it moved. Two days ago he tried really running! Pretty soon he was asking for more, and today I could hear him running on it by himself, without the lure of a toy to chase. Win!