Its better than what I was expecting.  Its sturdy and solid once its together.  Getting the door spring pieces on can be a bit of a pain if you're looking for a precise fit.  The instructions aren't always clear.  If you're handy with putting things together it wont be a major issue.  If you aren't then you might want to call a friend to help you.  A few places wont be entirely clear as to where to screw something in.  There cabinet doors are mostly forgiving.  It does not seal perfectly tight.  There will be a few millimeters of space.  There is just enough room for a large little box to be placed inside.  It will likely work a little better with a slightly smaller litter box when I change it out.  I left the door open for a day or two and once my Siamese used it once or twice I was able to close the door.  Its working so far (about 4 days in).