I love the cabinet and had no problems at all putting it together.  It does take about 30-45 minutes to put it together. Everything was very well marked and there were extras of all screws, etc.  One thing I would warn potential buyers-- when measuring your space, remember this will have to sit away from the wall about an inch to allow clearance for the tray rail when opening the lid. My space was really too close for this, so I just added soft felt feet and I pull it away when I open it to clean the box.  I actually wish they had not put that on the design, but still love it overall. Love that the ugly box is hidden and that it virtually eliminates the tracked litter.