Excellent cat tree, poor instructions.
So, to assemble this thing, you start with the shelf under the wee house and work to the bottom, then you put on the top thingies. Then you take out a few screws, curse a bit, switch them around, wish a pox on whoever 'wrote' the instructions (ha!), and finally get it assembled.
Once you go through that hell, it's a very sturdy, well designed cat stand that doesn't wobble. The cats can even fit inside the little house (my maine coon can get in there, so it's a decent size, unlike most). Good.