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Seems a little glitchy, but it was cheap. It has both a chord and single note mode for tuning, and sometimes it seems to get confused when switching between the two. However, my biggest complaint is it's not a pedal. Even if it was, it would be hard to see the note based on how it is displayed as one light in a spectrum of notes.
In hindsight, should have just forked over more and got a Boss (they seem like they are the industry standard for a reason) and I'm constantly reminded of that fact when I see my friends tuning up for a jam session.