Works okay. I have to put it down on the headstock closer tot the strings to get good consistent readings. At the end of the headstock of my guitars (electric and acoustic) It seems to not always read it well. When I move it to the sides when tuning it it does great. I also have to move it form one side for the lower strings and the other side for the higher strings. Sometimes can get in the way of the tuners but still a nice set up for not having to plug in and very easy to read. Happy with it.