I do not normally like these but this tree/condo is SO GREAT!  I appreciate that it's narrow and doesn't take up a lot of space - and provide a fabulous perch for our kitty to relax and look outside the window and a great place to nap up high and also a lot of scratching posts to get frisky on. It took our kitty a few days to venture to the top but now that she feels comfortable she's up there a lot!!   This is well constructed and quite stable. Yes on top a tiny bit wobbly but much less than a tree and your feline will get used to it.  I am SO happy we purchased and I know you will be too!  Quick delivery and great customer service too on top of it all. I am a relatively new customer and I will be back!