When it first came I thought this is it? How can my cats enjoy these small pieces? But as I assembled it, things improved and was impressed with the easy assembly, and how sturdy it was. My cats did not particularly like the 3 top beds, as it is just material, and nothing hard to keep them feeling secure up there, and they are about a 1/4 smaller than the top climber bed on their other climber. They really enjoy laying on the top platform though. I would not suggest it for older cats as there is a bit of manuverng they need to do to climb up it.