This piece is AWESOME.  Easy to assemble and looks like a nice piece of furniture.  I own a Maine Coon and it is perfect for his size.  He took to it right away and it is very simple to clean.  Anyone with a small size cat could size down to the smaller unit.  I bought two of these.  I have one in my bedroom and one in the living room.  Top is sturdy and able to hold a lamp and alarm clock.  No more unsightly litter boxes!  The one issue I had was the top of one of the units was damaged in shipping.  I have emailed the company and am awaiting a new top.