I have a VX-III 1.5-5x20 with an illuminated duplex. It sits on a CZ550 full stock 30-06.
I like the scope and it has served me well in killing several deer. There are times when the light gathering early or late in the day is not as good as the massive optics my brother carries, but I have not had to pass up a legal light shot.
I have shot all my deer from 25-150 yards. I stalk and still hunt in the pacific northwest. Probably half the deer were shot with the illumination on.
I have not had a problem with too much illumination at the lowest setting unless it is DARK out. If it is, you can see some internal scattering in the scope.
I like the fact that it is a nice duplex reticle when the illumination is off. I am confident that the reticle/scope/rifle would allow me to shoot better groups at the bench than I am able to produce.