The Peterson StroboClip HD has one of the best headstock clamps of any headstock tuners I've ever used and NO trouble reading notes anywhere on the fretboard. Second, the StroboClip HD is accurate. Very accurate - good enough to intonate pro guitars for studio and session work. Against an aging 40 year old box style Peterson tuner, the tuning results are identical. The guitar sweetener for both electric and acoustic absolutely makes a difference!
However, the battery cover that holds the CR2032 button battery is a weak link. Mine has trouble staying closed.
Update 4/22. Peterson sent a replacement battery door cover and it solved the problem! Fits correctly. Thank you.