My cats love this tower. I hadn't even finished sorting the pieces before my cat decided she didn't know what it was but it would be hers. It was also quite easy to assemble. I would give it five stars if it weren't for one major issue. the right side with the two donuts and the floor hammock is very wobbly. The cat it was bought for finds it slightly too unstable to spend much time on. If it had something to help support it better, like an included wall support beam or even a mild redesign to make it more stable, I'd have given it a full five stars. I will have to buy something to secure it to the wall so my cat will feel comfortable being on the right half of the tower. For now she's happy with the left half which was clearly designed better. Overall, if the cats are happy I am happy.