Three guitars: A Guitarra Artesana classic, an Arcangel Fernandez flamenco, and a Go travel guitar. They can all be tune good, fine, well, and/or accurately.

I suppose they work okay for some people, but I've found electronic tuners to be a pain in the butt. I tune the 5th string 5th fret harmonic to a 440-A tuning fork (you can check to see if the 5th string is in tune by getting the fork vibrating and touching the handle of it to the bridge or soundboard; if it's in tune, the 5th string will sing a 440-A back at you), then tune as Strollin' Johnny does: 5th and 12th fret harmonics. Then I check octaves all over the place. Works fine, and the guitars are happy in all keys.

Don Firth