There's no doubt that the high end Peterson's are the gold standard for tuning and probably used by every luthier and guitar tech on this earth, but for $130 this is far more accurate, to my ear, than the Boss TU-12 that I own. My guitar just sounds more musical and 'right' to my ear. Aside from the improvement in accuracy, I also dig not having to get the needle to stop bouncing and not having to squint to see the display. I'm old and my sight is terrible. With the money back guarantee it's definitely worth a shot.