My cats like to climb so I wanted a taller condo with more tiers. They love to play, 'King of the Mountain' and will bat at one another from the two top levels. I enjoy watching them play.
My cats are 10-15 lbs, so the only thing I would improve on, is, the bottom could have more weight to keep the condo from tipping when the jump on.  I like the toy rug balls that come with the unit. Most condos come with toys that do not stay on for very long.I like this condo very much, and most importantly, my cats love it!