I have a 552 AA ver., and so far I like it. It may not be as "bullet proof" as the Aimpoint but unless you are at war dose it matter to you?
You can rise the intensity in day light to the point of being way to bright.
When I was looking for optics I talked with 7 guys that worked on some sort of tac team, SWAT types. A couple were diehard EoTech or Aimpoint. The rest said get what works for me. I was hoping I would get a clear get that model answer.