Stable and just enough for two cats
This is a nice cat tree. It is pretty stable and very easy to assemble. My cats act like maniacs sometimes, and they race onto the tree at great speed, but it hasn't fallen over so far. They also love to sharpen their little claws on this thing, so it definitely fulfills that function.
I like the fact that you can easily take off all the plushy parts to clean them.
Only one minus point is that my larger cat (5kg) doesn't fit in the round beds, only the smaller one does (3.5kg).