I've been meaning to find one for them for awhile now. Finally got one the other day, just arrived today. Just finished putting it together.

I dont think they know what to think about it yet. I'll have to try and get a picture of them on it later. So far only one of my cats is playing on it.

So far one is currently sitting up on one of the perches, the other started playing in the box it came in because of course XD