We only use wee pads unless we are out somewhere. (she "will" go outside) The problem with petedge is their shipping rates are so high
I have tried a few different pads. We use small cheap unscented ones in the kitchen and change more often. (they are actually bed pads for humans) Her other potty spot is in our room in her expen. I like the large puppy size ones from Target best.
Never used a litter box.