I have the 5-20x50 ZA5. Was a demo but no issues yet; heard some of the first ones had problems but they've cleaned them up and Minox now has a lifetime warranty. Assembled-in-U.S. and Schott glass are positives. Long eye relief may give kind of a "distant" f.o.v. for some, but doesn't bother me; the BRX reticle is kind of fine, though. Most compact and light 50mm scope I've seen yet. Not ashamed to run one in low-end Rifleman rings on my Cooper Varminter while that rifle's Leupold VX3 is out for service; might just leave it that way as I see no difference in accuracy, and the Minox seems to have a little better light-gathering ability.