Was issued an Aimpoint, and used it successfully for years. I recently bought an EO Tech, and am very happy with it. Both are great, but most of what I do is up close in low light. For me, the EO is faster and easier to find (put big circle on taget and do your thing). Also, the smaller center dot makes longer range stuff easier. Add to that the lower cost and not having to buy a mount, and it's an easy choice IMO. I know that battery life isn't as good, but I throw a handfull of AA's in my rifle bag, and am set up for years (my dept has hundreds of AA's lying around, and few 1/3N batteries - if any). Also, I don't know how many times I left my Aimpoint on a high setting in the bag for days on end (because I'm stupid). While the battery never ran out - ever - I like the fact that the EO tech turns itself off. Also, two of our Aimpoints had to be sent back to the factory to get the switch replaced (wouldn't work at all - bad). Went smooth, Aimpoint was great, but they are not indestructible as lots of folks would have you believe. From a guy who has used both, right now I lean toward the EO.