I have had this pedal for three years. The best thing about this is the option for bypassing the signal to tune. Very nice, you can choose to tune with your signal still going to your amp, or you can kill the signal so no one has to hear your annoying tuning sounds. Its also has the ability to power up up to seven other pedals. Very awesome if you have a bunch of boss or similar pedals and don't want to bring 7 wall warts also. There really is nothing bad about this tuner, always works great for me. This is the only model I have ever tried. These go for $100 usually, which is expensive, but I think worth it. Being in tune, and being able to tune on a loud live stage is absolutely necessary. I would absolutely buy this pedal again. Every guitarist should have one because even people with great pitch have a hard time tuning in a loud atmosphere.