5 plus Stars the Peterson StrobPlus HD W/Metronome Upgrade is the bees knees! Top of the line tuner for my 2019 Gibson Les Paul Standard HP....Nothing but the best for my baby! The tutorials are excellent for learning all it features and nuances. Blows those head stock tunners away. Now that I have experience the exactness of a perfectly tuned Guitar there’s no going back to anything else. Kudos to you Peterson, I’m spreading the word of what a great product you have developed.