Been a fan of the EOTech for about 6 years now. Zeroed at 25 yards, rounds drop back into point of aim at 300 or so. At all points of the battle zero trajectory, the hit is either at or above the dot.
The ring and dot is great for older eyes. LARGE field of view. If a range is known, targeting can be done placing desired impact midway between the dot and the top of the ring (or bottom if beyond the 300-ish range). Same thing goes for snap windage. For close in, ring, target, press.
The newest model uses a single CR123 mounted horizontal relative to the bore axis. This arrangement is durable, and alleviates the early model problem of the sight winking out under recoil (corrected almost immediately with the addition of rubber holders for the battery springs).
All in all, this is preferred over the other dot or chevron sights (your mileage may vary). Very much worth the 5 bills or so to top your ar.
Good hunting.....
Thank you for your responses and your recommendations.