What an improvement over my previous Stroboclip— the old model. Where the old one would take forever, if at all, to settle on a note, this one doesn't play around. It finds the note, and responds with clear visuals to the slightest adjustments in the tuning. This is how a strobe tuner should work. Yeah, the on-off button is annoying to find in the dark, and to use, but other than that, this is a great tuner. I use it on my nine different instruments, each quirky in its own way, and the Stroboclip HD gets down to business, and enables me to accurately tune my acoustic, electric, resonator, 12-string, and baritone guitars, and my ukulele.