I´d been playing guitar quite happily without a tuner for the last 30 years or so and really prided myself on having a pretty good ear. The turning point came in the recording studio when it became all too obvious that that wasnt really the case at all. So I went out and bought myself an LED chromatic tuner, came back, tuned to perfection, and what did I get to hear as a result?
"Are you sure that B´s really in tune?"
And "Maybe the D´s still a bit flat (or sharp - usually both)!
Anyway, after lots twiddling and swearing, we finally got the recordings finished - and the tuner has been sitting on the shelf, unused ever since!!
Ciao,
J.