While this thing is pretty aged, I hadn’t seen a robotic tuner for less than a hundred bucks so $49 looks like it might be just the thing for the lazy guitar tuners out there. Best off all, they have an excellent video description with a real, honest-to-goodness As Seen On TV voiceover artist.
It requires a $12 mic for tuning acoustic guitars but that said it’s not a bad price either way.