So my cats are larger and older, and this is designed for spry young kittens. The lounge areas are not big enough to be comfortable for my cats, and it's very hard for them to climb to the top. We ordered this in part because it has multiple levels with stairs for access but most of the stairs sit at a very acute angle, and accessing the higher levels is an almost straight up climb for them.
Unfortunately for us, this is an awesome cat tree...beautiful, easy to assemble, sleek looking, and very sturdy. Just take into consideration your cats age and size and agility when thinking of purchasing this. Our cats are both 5, and its tough for them to play on :(