I have been searching for a unicorn for some time, now. A "do it all" optic. While everyone knows such a creature does not exist, I think I have come very close.
The good:
The Eotech is the fastest CQB optic I know of. It is a pure "assaulter" optic, and that's what you will see on the guns of those who assault. SEAL teams, SWAT officers, etc. I chose this optic because I do not leave a round in my M4. I leave it cruiser ready. If I can rack a charging handle, I can press a button to turn it on. The Aimpoint is the natural competitor of the Eotech, which is why I raise this. Further, you will likely have to adjust the Aimpoint or Eotech regardless, depending on ambient light, etc.
The Eotech has "clear" glass without a "tint". At night through the magnifier, this is VERY nice. Aimpoint isn't in the same ballpark, here.
It is ALL about gross-motor skills. There is no tiny ring, and there is no switch. You knock the magnifier out of the way---and that mount is SOLID. No flop, no rattle, and it is a very very decisive thing to move it from one position to the other.
The system is "adaptable", for example, if I am out hunting or whatnot, I can run the magnifier. If I have it by my bed, I can take the magnifier off and shed weight.
The bad:
It is heavy, about like a quality 1-6X optic + mount, with the magnifier in place.
It is expensive. Mine cost around $1,000 for the combo (or roughly 1/2 what a 6X optic runs...)
it only goes to 3X (for my environment, this is PLENTY. When I move, it will be MORE than plenty).
The Neutral:
Eye relief is decent. FAR better than a TA31 ACOG, but not quite as good as some of the best 1-6X optics.
The eyebox is decent. Again, not bad, but not great, either. I found it more tricky than the 1-6X scopes on 1X, but did not really mess with them on 3X, either, so it's hard to directly compare, but I wager it would perform about like a mid-grade 1-6X on 3X. Say, a Vortex, etc.
Over-all, I feel that the Eotech is one of the best RDS type optics available, and the G33 magnifier really gives it the legs someone might want for a 2-300 yard shot, or better PID, without breaking the bank, and without adding "mandatory" (you can't just cut the weight of a K16i in half when you turn it to 1X) weight or reducing 1X performance.
Forgive my ghetto "test platform", but my M4 doesn't need to be waggled around my neighborhood...Also, the reticle is centered when mounted on my rifle. Further, if it is NOT, you can adjust the position of the reticle in the magnifier via controls on the magnifier. This does NOT affect zero.
The balcony is at approximately 125m.