I've got a buddy that's got half a dozen of them, and loves them. They're all on centerfire rifles; 6.5cm, 7mm-08, etc. and he says they hold true and are very clear. I have one 4-12x50 on my 243, and it's pretty good considering I paid a crisp hundred dollar bill for it. It's surprisingly clear, and holds it's zero. My only gripe is the AO is still stiff after four years of use, besides being not "perfect" at longer distances. Inside 200 yards it's sharp and clear, further and it gets a bit fuzzy.
Mac