Not quite suitable for a larger cat. The concave resting platform clearly small for a mid-size or larger cat (like mine) to stretch at. 
Main flaw is that it is difficult for a cat to get from the 3rd level to the top one, and is virtually impossible to climb down from top to next level below. I am modifying the design for overall happy with the rest of product. 

Pros: nice quality overall
Cons: Needs modification for cat to be able to go back and forth from 3rd level to the top one