I have used Leupolds in the past and not had any problems. I do like the upper end German optics much better. I have an older 3X9 Zeiss Dia-Vari that is over the top and has never had a problem. I also have a Schmidt& Bender with the lighted reticule that is in a league of it's own. The absolute worse scopes I have ever used were Redfields! Real boat anchors to say the least. I have heard numerous complaints from Swarovski users which is surprising due to the cost of these scopes.I suppose that any of us could, on the right day, get a scope from any maker, that was built on a Monday or a Friday.