I do not like Simple solutions...they are weak, leak and smell like urine once used. Nature's Miracle is okay but still thin and the edges had run off leaking. The best potty pad I have found is
Gridlock Puppy Training Wee Wee Pads...sold thru Amazon...FANTASTIC!!! They are thick, made very well and DO NOT leak or have run off! They DO NOT allow the urine to smell in the home!

They hold plenty of fluid and Cerise continues to use them over and over (about three or more days a pad) until there isn't much clear space then I change them.
I really want to try and use washable pads for eco purposes but these have me hooked right now.