The best feature is that the post coming up from the condo is in the corner, so my small cat can use the top of the condo to lie down. (Some other designs ruin the condo top by putting the post smack dab in the middle.)

I thought she would like being able to climb all the way to the top via a single post, but she prefers to jump from platform to platform, and hardly ever goes to the top two. I wanted the lips on the top two platforms to prevent nap fails, but she never naps up there.

She likes having two entrances to the condo and having big porches for the condo's entrances. The thing is completely stable, and I cut the strings off the balls so that she won't get tangled in them.