Very happy with this cat tree. You do have to pay close attention to the details putting it together, and the directions are all pictures, very few words, but got it assembled, mostly. I put the top board on in the wrong direction and couldn't use the ladder then. After all the time it took me to get it lined up and attached, I wasn't taking it off again, so I just left the ladder/ramp off. My cat LOVES it. He loves being up high and this is right up near the ceiling, allowing him to lord his greatness over everyone.  I like having the solid base with 4 posts going up through the whole thing. It is very stable and doesn't rock too much, even when my 15 pound cat jumps off it from on high. I haven't attached the no-tip straps yet because it is up against windows so my cat can watch everything outside too, but I will probably find a way to attach those at some point. Thus far, it's been very stable and hasn't been a problem.