Very much like this litter box holder.  The best part is the angle is takes to get in negating my large dogs being able to reach their heads into it.  There's two minor things I wish were different.  I wish it were a bit, like an inch, deeper.  I put in a regular sized little box and couldnt close the door, forcing me to use a very small littler box.  Also, the litter trap mat is awesome, but doesnt stay put when my cats climb up the ramp.  I put in a screw up top to hold it in place.