Nobody will like this answer but I have never worn one of those devices and likely never would. That would just induce some form of psychosis and paranoia about ones health and could likely trigger someone to go to a medical facility wasting their resources and spending money. According to the BMJ and other studies medical facilities are the 3rd leading cause of mortality. I just eat healthy, get some exercise and keep stress levels low. It is not clear to me that these devices were made for anything other than sending people to doctors. I have yet to meet a doctor that will pursue root causes vs. treating someone with tinker toy rebound drugs. In my view it's just a circle of wasted money and resources trapping people in an endless loop of doctor visits without them doing any real diagnosis.