This seemed like a really great idea for a cat toy. Enticing design, catnip built in, too big to get easily lost... except my cat absolutely HATES this toy. The problem is in the built-in squeaking noise. She was curious enough about the shape of the toy, but once she heard that noise she was having none of it and actually hisses when she hears it. Very unusual for this cat.
Of course, what my cat likes certainly doesn't represent what all or even most cats like- but keep in mind what your cat responds best to before buying one of these. I may take out the battery and add a bell to this for my cat, provided she doesn't remain traumatized by this product.