Those HHA sights are sweet. My shooting has really improved since I went to a single pin. I got to where I couldn't handle all the glare coming off of multiple fiber optic pin sights.

I leave my slider on the 30 yard mark when I hunt and don't have to move my pin on any shot 30 yards or in. 30 yards covers a most of the shots I get, but adjustments can be made quickly. I think a lot of people would be sold on single pin sights if they ever tried them.