I have tried many many sights, and for me and many others Eotech is the way to go, from large field of view, small center reticle dot for accurate sharp shooting (aimpoint red dot is far to large for sharp shooting) Quick target acquisition and ranging with the large circle in the reticle. All in all, out of the many many I tried, I would not give up my Eotech. I have the Eotech 553, for CQB i turn the brightness up, for sharp shooting, I turn the brightness down and can do headshots at 300m all day long. Aimpoint during trials we were lucky to strike the torso at 300m, the reticle covered the entire body. And for many in the law enforcement tactical world, Eotech is the way to go. I can see for long deployments in the military, the fact the sight is battery powered and doesnt last as long as aimpoint could be a issue, but there is a warning at I believe begins at 8 hours remaining and continues till its dead, so as the reticle starts to blink, swap batteries and you wont wind up with a ineffective paperweight with a window in a firefight. A red dot sight is meant for CQB, quick target acquisition, however if you need to engage targets further with any precision, Eotech fits the bill as well.
Only downfall to eotech I have ever witnessed, at times, shutting it down and powering it back up, the zero will shift slightly. This has not happened with my eotech, but I witnessed it at a range before and it was discussed on a marksman course that this could happen with eotech sights. There is a allowance of 2 MOA shift according to military requirements ( I was only told this, unverified)