I bought it a week ago, I find it very good, it is a chromatic tuner, it was exactly what I wanted to be able to give me more serious, it works well, it reacts quickly, it is What his job. Well it's over for that price € 30 must not atendre a super tough thing (it is plastic), but hey I do not want to invest in a boss 100 €. It also gives the notes for those who would like to give a ear. Small tip instead of buying a boss Take a selector and connect the tuner and left the lit, and when you need to change your channel. I put 10 because it does very well what is asked. To see consomation to the battery level and slidité long term.