PC-2 Pitchclip : Sturdy, Reliable, and very useful!

I've never had much success with clip-on tuners in the past, for reasons I still don't quite understand. This, however, has been working almost perfectly for me! Just clip it on and tune, no questions asked. My only three (very minor) complaints are: 1) it occasionally struggles to find pitches on the higher strings (which seems to be true of a lot of tuners, both clip-on and pedal), 2) it resonates/rumbles very unpleasantly while attached to a guitar's headstock, which makes it a bit uncomfortable to leave attached when not in use, and 3) it has turned itself off a couple of times during tuning. These are all very minor though, and their impact on doing what I need it to do has been minimal. A great purchase overall!