This is a great cat tree!  Easy to put together.  I like the "fur" like covering instead of carpet.  While it does wiggly a little, as long as you screw all screws in good and tight, it shouldn't be too much of a problem.  I have put it up against a corner for a little more stability and I put the tree on a 3 foot end table which gives it a flat surface to be on instead of carpet which can cause wiggling.  I firmly tightened all legs of the table and the tree is very stable.  So don't worry about too much movement.  My 11 lb. little kitty boy loves it and loves the toy and the little cubby hole box.  Highly recommend. The products of this manufacturer have not disappointed me yet.  Thanks!!