Looks neat and contains the litter box nicely. Pair with some sort of pad in the main chamber as well as the 'exit tunnel' to catch any spillover/tracked litter. 

One major downside however. Because of how the door opens (folds down), you'd be tempted to drag the litter box out over it when cleaning. Don't. The door is flimsily attached with a spot of glue and some finishing nails. It will very quickly detach if you put any weight on it while its down. Nothing some DIY sandpaper, wood glue, and screws can't fix, but still.