Comment Huge grain of salt (Score 3, Insightful) 82
Any time a single device (or drug, or supplement, or treatment) purports to treat a wide variety of seemingly unrelated ailments, your first instinct should be heavy skepticism. Also, when a device purports to work for ailments that have soft endpoints and are amenable to placebo effect, you should evaluate any study carefully. The literature is filled with studies that purport to show promising results, only to collapse when more rigorous methods are applied.
epilepsy, depression, stroke, tinnitus, heart failure, migraines, asthma,
With the exception of stroke and heart failure, this is a list of ailments that are commonly targeted by scam medicine, because they are conditions that will often be self-reported as improved no matter what the intervention. When more rigorous measurements are applied, these effects tend to evaporate.
Let's hope it works, but let's look for some well done studies too.