This is just the best cat tower, its very sturdy - we have two 11 week old kittens that got this for their Christmas present (at just 8 weeks old) and i must say its very tall and i was a little nervous as they were so tiny but after 30 mins of a few tumbles and the claws saving them they were sorted. They absolutely love it! they sleep on it, use it as a play base and leap off it to everywhere else. Im so glad we got this for them and i didnt have anything to worry about safety wise they very quickly learnt how to navigate it! if you have cats you just have to buy this, a well known pet store sells one thats nowhere near as good for around £100 - this is far better, very soft and well crafted - i will buy another when they have worn this one out but i think it will take a while! delievered in time for Xmas even though it stated before the 31st Dec, it arrived on the 23rd - im a very happy customer/1