A well-thought-out & sturdy design. Clear instructions and included hardware made it easy for a less-than-carpentry-savvy customer like myself to put it together. (Just make sure to do so in a well-ventilated room--fumes from the wood-finish were pretty strong.)  The XL size nicely fits a PetSafe Simply Clean Self-Cleaning litterbox (store.petsafe.net/simply-clean-litter-box-system), and my cat adapted right away, no stress.
Two suggested tweaks:
- Door knobs closer to the tops of the doors would help
- Fitting the liner more closely to the inside of the cabinet to prevent litter spillage between liner and inside of walls