Started buying Mueller scopes several years ago largely because of recommendations and reviews found on the forum here and a few other places. I found them to be a great buy and the optics were very good. Finally had to have some repair done on one of the 4-16x50 Tactical units I have and sent it to Mueller. I was expecting a long delay. Within a week I had my scope back and included in the return were two new batteries for the illuminated reticule. I was impressed with their customer service big time. No problems, no delay! Will definitely keep recommending Mueller.