I see that everyone who is actually any good uses one. Good enough reason for me to start again. I havn't used one in a very long time. My question is, at what point does it make sense NOT to use one? I'm thinking that it could be when you are just figuring out notes on the fretboard, getting your fingers to go where they need be. Or am I dead wrong? Should I be using it right from the beginning even if the tempo is screwed up?