I've tried four different pads now with Sydney, and the only one that works for her is JumpStart Puppy Training Pads. They actually guarantee that your puppy will be trained (if you follow their directions) or your money back. I'm using them with crate training and not what they suggested, but I think either way would work. Amazon has them on sale.
Amazon.com: Jump Start Puppy Pads - 50 count:...