Great solution if you are looking for something nice to hid  your cat's the litter box. I live in a small apartment so it looks like a nice piece of furniture.
I didn't have any problems with the size. My cat is about 9lb (4kg) and of course you can't fit a giant litter box in this box.. so please, be reasonable.
Here  is a picture. (I put a cushion on the top because Tara (my cat) loves this spot.)
Easy to assemble. 
Material: Not the best in the world. But I can assure that is everything you're going to need and for a really good price.