This arrived faster than expected.  It took only 30 minutes to put together even with the help from the cats.  I put is next to a big window and instant cat magnet.  All three of our cats were on the cat condo within 30 minutes.   
I read many reviews before my purchase.  I picked this one because all our cats are over lbs.  This works perfect even for our largest cat (over 20libs). 

Pros: Great for "plus size" cats
Cons: none noted