I have the Airmax 30SF Compact 4-16x44 on all four of my springers (2 TX's, ProSport, HW80) and the 6-24 on my HW100

Nice and clear, only thing that was stiff on mine initially was the rotary illumination control

I wear glasses, varifocals, and have had no issue with the rear lens (40mm from memory?).. providing head and eye alignment are good you should have no issues

My only criticism is that the reticle is very fine; clearly marked, very usable, but on a darker target or background could get lost - switch on the illumination and its not a problem at all