I have some and spent over 6 months playing with them side by side with Vipers, Zeiss Terra, and others in the $300-600 price range anytime I drove by a store that had binoculars. I think a lot depends on one's eyes but do not think that there is much difference between the group. I found that there was a small pinpoint with the Vipers that I could get focused slightly sharper than the Leupolds, but outside of that the Leupolds were a bit clearer to my eyes. Bruce above summed up already what my thoughts are. Overall, my eyes felt more at ease through the Leupolds, and they fit my face the best.