My cats genuine seem to really love at least like a lot these condos. They are outdoor cats so we can't bring them in from the cold but we so put them in a building at night to feed so I put the condos in there and they went immediately into them.  I have three cats and two sleep in one and my largest cat goes in the other.  Its good because they are neighbors in their condos.  LOL  

Pros: Cats love.  Very spacious (my cats are big).  strong and sturdy.  
Cons: None that I know of.