I upgraded from older heavier mode
I guide for North American big game.. This is an upgrade from the older 45mm model.
I like the size and weight along with new features. On a sheep hunt I found the true range over angles to be very handy. I think they range better in the fog than the older models. Haven't been able to use bullet drop calculator yet.
Dislike the range button placement. Seems difficult to find wile focusing on a target. The old 45mm were easier on the eyes and brighter.
Overall I think this is excellent choice for any guide.