I have six of them really like them. We don't have the option of using PDAs ect due to having to make quick decisions on to shoot or not and then aim for the correct impact point at said yardage. It really makes quick shots easy. If we has all day to decide to shoot and to figure out the hold and then play with the knobs we would have probably gone with the R1 or R2. But since we have to be fast AND accurate, the 1RR is for us.