The latest Fusions have much better optics than the originals, and the range-finder is even a little better. But the overall build quality seems like it might be flimsier, so I'm waiting until after I've use my test sample in the field awhile before making up my mind.
I still have the original Fusion, and have used it hard for three years now. The optics are OK for most hunting, but not for serious open-county glassing. However, they're apparently very well-built, because they've taken a licking and kept on ticking.
I've used the newer Swarovski and Zeiss enough to know they have very good optics--though as others have pointed out, not as good as the non-laser glass from the same companies. The range-finders are very good.
