I had my left knee replaced in 2007. It was a bum job from the beginning (doctor went back in to remove pieces of concrete he'd left less than 6 months after replacing). It has ached nearly as much since it was replaced as it did before - at least most of the time. I've used creams, ointments, pain patches, pain pills, steroid shots, you name it. None have really worked more than an hour or so. I saw an ad on FB for Heaven Patch and decided to give it a try since it had a money back guarantee. A...