These tuners are fabulous. Seriously. I've been playing guitar for 49 years. I currently have over 60 guitars in my personal collection, and owned a music store for a number of years. I toured and played professionally for many years as well. I have dozens of tuners, from headstock tuners of various brands and types to floor tuners, and even a Peterson Autostrobe 490 which I use for my repair bench. The original Stroboclip was amazing, and the new Stroboclip HD is even better. 'Regular' headstock tuners get you in the ballpark. The Stroboclip HD gets you perfectly in tune, right on the money. The Stomp Classic is stellar, as well. There simply is nothing better or more accurate than Peterson tuners.