I like the increased eye relief on it as I've always had to crane my neck a bit with the acogs, and the one i tooled around with in the store seemed to have really clear glass and a nice reticle. I just didn't like the right side brightness adjustment or the fact that (at least when i was looking at them) there weren't any other mounting options, when for a couple hundred more i could save up and buy a trijicon.
But my experience with them doesn't exactly make it past some internet research and a quick trip to the store so take what i say with a grain of salt.