I have been on the "Learning Note Names" exercise this week (Lesson 3). This is extremely boring, non musical and repetitious but I am actually learning the fret board. I've had guitars for about 10 years now and never really ventured past the open chords much. I've occasionally gone to barre chords, but only when all other options were harder. I've never seen much use for those frets but now I am learning something. I need to get back to playing music soon as my mind wanders off when it gets bored. When that happens, I usually end up buying another instrument, hence my signature.