I use the flat crib pads. At walmart you can get two in a package for like 9 bucks. They are WONDERFUL!! Plus Ive been saving money since I switched from disposable potty pads. The flat crib sheets are quilted and thick, wash perfectly and lay flat each and every time. Plus I love the size of them.
I don't think you would be disappointed if you used these instead of cloth puppy pads.