I've used an original blue Strobostomp for more than twenty years at home, stage and rehearsal for many years with great reliability and accuracy. I finally gave it to a fellow musician after buying the newer HD version. It's smaller and the screen is even brighter, making use on a dark stage even easier. The accuracy remains excellent. Anyone using a cheap headstock tuner will find both the Strobostomp HD and the Strobostomp HD Clip to be huge improvements. Everyone I play with either owns Strobostomps or begs to use mine.