When you play an instrument that can't be tuned in a session situation, as I do, the cheapie tuner, as employed by the typical guitar man (and, more distressingly, by fiddle players) is a Godsend. It means that we are all more or less basically in tune. What joy. But I can't help feeling that the guitar man ought to be getting just the one note on his tuner then doing things the proper way. But who am I.