I was skeptical about this product at first. The first time I used it I used sink water and I did a 30 minute session. The water turned brown and looked gross. I felt very tired and relaxed afterwords. However I was still skeptical thinking maybe due to the rust in the well water was why it changed color. So I used bottled, distilled water for the next treatment. Results were even nastier, but I felt relaxed the same. I slept better than I had in quite some time. Still feeling skeptical, I changed the foot salt I was using. At the end of the day after several uses, my skepticism has diminished. I live a pretty healthy lifestyle and never would have imagined what I was seeing in the water. Little particles, ranging in size and color. Silver, white and black. I didn’t see them until the 3rd or 4th use. After much research and coming across “scientific studies “ about the ineffectiveness of ion foot baths, I call bs. I think with any product or supplement that’s proven to promote better health and wellness, there’s always going to be a site around the corner debunking the effectiveness of it. The medical world doesn’t want us to be healthier. How would they make the income they do if they had no one to “help”.If you see negative comments, it’s in my opinion, the person isn’t using it correctly, following the directions or expectations are based on 1-2 x use. I felt results after the first time, but if you are patient and persistent, my guess is, you will understand my review.