I have been using HHA for 12 yrs and I think it makes me more successful. Was shooting 3 pins before but realized that having only one pin to concentrate on was a huge advantage for me, less to worry about. I also like the fact that the sight pin has a vertical post. On a broadside deer, you can put the post right on the backside of the front leg and know you are in the boiler room and it just makes things easier. I recommend trying several brands of single pin sights and choosing the one you like best. For me it is HHA.