I have 2 VX-I's and have never had a problem out of either one. Both are 4-12 power. 1 I have had for about 5 years now. It gets banged around in the woods while hunting, it was even in the truck with me in a rollover accident 2 years ago that totalled the truck. We flipped (reportedly from witnesses) 5 - 6 times at 70 mph and Guess what, not a thing wrong with the scope and it was still zeroed and has not lost zero yet. I buy Leupold whenever my wallet allows me to. I might get something cheaper to hold me over until I can get the Leupold, but in my opinion they are the best scope for the money and there is nobody else in the scope business who can even come close to their customer service or warranty.