I have owned a ZR ED1 and ED3 in 8x43. I gave the ED1 to my African tracker as a gift last August, and he was quite happy to finally own a good binocular. The ED3 lives in my home office and I use it to observe the goings-on at the two corn feeders behind my house.
The ED3 holds up pretty well along side my Leicas. The ZR has a bit of fringe fuzziness at the extreme edges of the field, whereas the Leica is crisp all the way to the edge. But my eyes are unable to appreciate any difference between the two binos in the center of the field, where we do all our field judging. And ergonomically, the ZR frankly fits me better than my Leicas. And the ED3 costs a fourth of what the German glass does.
The more expensive ED Prime HD is reputed to be equal to Euro binoculars in performance, but I can't comment, having never tried them. The birdwatchers really love them, and they're far more demanding than hunters.
The ZRs lack the snob appeal of Swarovski and Leica, but they perform all out of proportion to their price tag.
"For every complex problem there is an answer that is clear, simple.....and wrong." H. L. Mencken