It's cheap enough to put one in the case of every instrument you own, and accurate enough to do a better job that you can with your ears alone

For this low of a price it does a great job, and I really liked that it could be set to up to 5 semitones flat.

Korg has done an excellent job of making tuning your guitar easy

I bought this tuner for one reason, so I can tune my guitar to b flat tuning, but when I get this, I figured that it could at least do a better job then my TG Tuner (on computer, for free)

It is very easy to use and does a great job of tuning.