I use the Takara ones (have tourmaline in them) and have had really good results. I've had a gout/hyperacidity crisis after doing a parasite cleanse and the patches are the only thing that have been giving me real relief.
When I remove the patches while in the gout attack, they are very wet and have pulled a reddish tinted fluid from my great toe. The area on the patch nearest the toe is the most densely wet.
Seeing how these have helped my gout has convinced others to try them. I'm a firm believer, just wish they were MUCH cheaper. If they were cheaper, I'd use them every night.
You are supposed to use patches on both feet for a better detox, but I've been using them only on my right foot (where the gouty great toe joint is sore).