but my cat is 10.5 lbs a month ago and 1 year and growing.  He just toppled the tree because the hammock, which he loves, didn't grow with him -  too small for a 10.5 lb cat.

Pros: alot of fun this month until he grew out of it.
Cons: I braced the hammock by connecting it to the top of a post  until I can replace his hammock.