The small profile is a nice idea. Unfortunately if I want to keep it on the top of my headstock and put it in my case, the top of the headstock pushing against the top of the case loosens it and it falls off. So, just like any other tuner, it must be removed to put it in the case. Another issue I have is that when I play the low open E string, it doesn't show up on the tuner. Sometimes I can get it, playing the octave harmonic but that is a real bummer. The last thing I don't like is the display is weak and not very bright. I understand it helps conserve battery but come on, I need to see it! In certain light situations I can't see the display. In my opinion, D'Addario needs to work on improving this gadget!