I think side focus is the wave of the future and is a good thing. My reservation, is the technology up to the demand at this time. I have had three side focus scopes so far: #1 wouldn't focus (clearly) at 100 yards, #2 the focus moved with every shot and had to re-focus before each shot, #3 worked fine for about 200 rounds with a 6mm then something snapped and lost all focus. I won't mention the 3 different brand names because it might just be my bad luck. In use they were very handy with the knob on the size but I thought they were more sensitive to focus then the objective focus.