I currently own two Simmons scopes and cannot complain in the least.You get what you pay for in optics,so if you pay $50,you get a $50 scope.A Leupold does not run for $50,so why compare it to a bottom line Simmons?? I also recently purchased the Aetec and have no regrets in doing so.By the way,EVERY manufacturer has its lemons,I have heard of problems with Nikon,Weaver,Redfield and yes..even Leupold! In every case,its been a defect in assembly..not an inheirent problem with the product.