A bit hit and miss!
My youngest loves these kinds of toys with balls inside them, as well as mice and pole toys. So when I saw this I thought that I'd give it a go. He hasn't played with the balls at all. However, he does like to sit on the cheese and he does like to play with the mouse, both with it attached to the cheese and without. The quality isn't great so I can imagine it won't last that long ( i've had it 2½ months so far) but overall he does enjoy it and it didn't cost that much to begin with.