I was pretty skeptical, and honestly I take most review comments on FB with a grain of salt since I assume a lot of them are fake or paid. Not so with this product. Our older dog has taken to peeing in the living room at night and we decided to try this. Even with the stains of a pretty good sized silver lab, this stuff seems to cut through it. My only complaint is that there isn't an easy way to transfer the refill jugs into the squirt bottles without using a funnel (which we didn't have). Otherwise, I can't recommend this enough.