this was a must buy. while my brother and father are both avid guitar players neither can read music. they are trying to teach two of my girls to play and this has been a perfect way to teach them the notes and how to tune the guitar. I am super inpressed with the visuals on the screen. how it shows you exactly what octive you are at and such. I highly reccommend this for anyone that is just learning the guitar or trying to teach as it has helped my two girls progress alot faster than i feel they would have. Also, this is a very simple device to use and is very easy to read and understand!