This was the worst product we have ever bought. Shortly after our dogs (Loca and Warrior) had her three babies (Lotus Flower, Sassy Girl, and General Davis) we knew that potty training was going to be a pain in the butt. So we bought the Potty Patch to train them. They learned to use it but there were several problems with it. First off, the pee goes down in a shallow plastic tray that when you go to empty it and spill on you easily. The grass mat will start to stink if you do not clean it, but when you clean it... the grass pieces start to come off. The idea for the patch was great, but there were to many design flaws in it. Other then that it worked great for training them.
Thanks for the review on the patch. I was considering getting it for my adult dog who sometimes forgets and still goes in the house, but I guess I'll find something else.