The quality of the materials is excellent with a nice soft plush covering and great scratching poles.  However, the bottom of the unit is too small and light to support the whole cat tree without some major wobbling, even with having it against a wall and putting shims under it to make it a little more steady.  A larger, heavier bottom platform would make a huge difference. My cat will not go onto the top platforms because the unit is too shaky.   If I want her to get full use of the tree, I will have to make and screw on another larger, heavier home-made bottom to make it all more steady.  The unit was a very reasonable price but with having to alter it, it's no longer a bargain.