I have the 2 MOA Aimpoint PRO and the dot is right there, crispy and easy to find when shouldering the rifle. I could only imagine the 4moa dot is even easier.
It's extremely light and durable.
The highest brightness setting is to high in sunny outdoor conditions for my liking so the adjust-ability is there for all users.
Slim profile on these types of optics allow easy 2 eye open shooting as well and the glass is very crisp and clear to look through. When going 2 eye open you don't even really notice the profile of the optic, just a dot floating on your point of impact.
The battery life of the Aimpoint PRO also sets it apart from others.