This tree was easy to assemble and is a good design for more than one cat.  My cats are older so they're not as adventurous as younger cats or kittens would be on this tree.  They do enjoy sitting in the house and laying on the middle level to look out the window, as well as play with the hanging rope.  Also the step ladder makes it easy for my female to climb up to the first platform, since she's not the most graceful of jumpers.

Pros: Easy to assemble.  I liked the color I chose (Mocha).  Fun for the cats.