I bought my first Nightforce scope almost 15 years ago. It was a Nightforce NXS 5.5x22x56 model and I have been on many successful hunts and shoots with it and other Nightforce models.
Some years ago I finally had a chance to tour the Nightforce headquarters facility in Orofino, Idaho. I was just wowed by all the attention to quality and details during our 4 hour tour of the facility. If your scope says "Nightforce" on it you can trust it.