I like that one from PetSmart.
We went to our Walmart and the storage bin selection really stinks at our store. Everything was way to high (just like a regular hooded liter box).
Thumper gets help getting into the box, she can get out on her own.
I havent trusted her to get in by herself (making it on time) since she has had couple accidents. Mom knows her "look & action" of "I gotta pee" which works when your home but NOT when your away LOL

The only concern about puppy pads in front of the box is everyone else using the box has to step on them before entering. Now if everyone just thinks it's a mat we are set. Otherwise, I'm watching for peeing and pooping. Peeing, cant use to many times since it's wet. At least with poop, I can scoop it up right away.

Gotta think on this one a bit.