Now that some of you have had Zen Ray optics for a couple of years, what is your take on how they are holding up long term? I have a pair of the ZRS binoculars, and am mostly pleased. The lense coating seems very soft. I have never scratched any lens coating before, but somehow got one of these. Build quality seems to be holding up fine. Just wondered how everybody else feels about theirs, as they have sort of faded off radar lately.