I Bought the wizdog a year ago, and i did not like it.. well actually my yorkies didn't enjoy it.. they were frightened of it, and did not like the feel of the grate on their feet.
after i slowly introduced the wizdog to them, they totally started peeing everywhere but the wizdog..
they know to pee/poo on the pad.. so i just decided to get rid of the wizdog, and they were happy..
it's good to know that it actually worked for other people though!