Kind of subjective to the shooter isn't it? It won't really matter and is not a valid defense to say "The guys all said it was fine" in court.

Do you feel comfy with it, would YOU feel more or less confident having to use it over iron sights in a stress situation? If you shoot better that's a plus off the bat I would think.
Looks plenty acceptable to me for rapid fire, everything is in the intended target center but it's not me making that choice and the caveat to my opinion is I don't use a dot for CC, yet.
I am not pro or con on dots, I would have to use one more on a pistol to decide, my hang up being sight acquisition and that's a practice issue, but they bring the same pluses more or less they do for rifles, and I don't shoot much iron sights anymore because optics are an advantage. Especially for eyes that suck now.