I predict the Maestro, which uses laser lights to show you what frets to press, will teach me guitar as well as a self-playing piano helped me learn the keyboard: not too well.
Strap the Maestro onto any guitar, load a music file with the songs you need to learn, and then little laser lights will point out the way to play chords. Only, the hardest part of learning the guitar for me was switching your hand fast enough between chords, not actually knowing which to press since most tablatures already had that covered...
So I take it back. This is worse than the self-playing piano. Also, I wish I had musical talent. [Dvice]