Our cats love it
We got this months ago, and our cats can't stop playing with it. We hide balls, springs and plushie toys in it, and they hunt them on their own. We also play with them by moving a stick between the two layers and let them hunt it - they ask for play often. We also tried hiding snacks, but one of our cats got his neck through the bigger hole, and got really scared, so we no longer do that. But we do really recommend it, it is entertaining and engaging, and great for individual and shared play.