I purchased this to get away from the always shedding carpet-covered cat trees.  It was not easy to put together.  The instructions are pictorial and way too small.  It was difficult to read the part numbers or to see exactly how to orient the pieces.   I made an orientation mistake early, so the openings to the boxes are backwards.  It wasn’t until it was 90 built that I realized what went wrong and I wasn’t willing to take it completely apart.   The boxes and top perch may be too small for my non-petite felines.  The posts for the cam fittings are hard to screw into the plastic sleeves and it’s very easy to strip the screws.