I've used HHA single pin sights before,I'd give HHA sights a B grade, they are fine sights and aredefinately serviceable. Iuse a 5 pin sight, a SpotHogg, HoggIt with wrap kit and it's the cadilac of sights in my opinionbut I think single pins can haveadvantages overmultiple pin sights for some hunters. If you're the type who suffers from buck fever or target panic, the single pin is almost always best as it lets you focus on just one pin and it reduces clutter in thesight window and lets youconcentrate on putting that one pin on the bread box at the cruicial high pressure moment.For long range shots, some single pin sights have full draw elevation like the Impact Archery Full Draw sight. I've never used that one though so I have no opinion on it.