As you may be aware of, scientists enjoy controversies. After all, spirited discussions are often the source of innovation, intellectual advances, and inspiration. Also, let's face it, sometimes they are not. In any case, recent papers have started to seriously question some of the assumptions that build the foundation of many tDCS/tACS studies. Some of the objections are likely appropriate, others I would disagree with (this is material for another post). One thing that is clear to me is that the field has grown so fast and attracted so many researchers with little background in using brain stimulation, or even neuroscience, that I often see studies that are unfortunately tainted by some newbie mistakes. So here is my mission: let's talk about some of these challenges to improve the quality of our studies.