They definitely have good cs, but I see many post where they just die or the glass comes out of.the window. Personally had a button stop working on mine after a year, a friend of mine had the glass crack after about a year.
I'm not anti holosun, I would just buy 2 if I bought one again. I personally had a hard time getting past the magnification on the glass of my replacement unit and just felt better off washing my hands of it.