I used Night Skin (New Vitality Company)for about two years. I did not see a significant difference in my skin that was worth paying $40.00 a bottle for.
I did have a brown spot on my face that is lighter but the Night Skin did not completely fade it. Also I stopped using it because my husband said my face smelled like burnt french fries. I noticed the odor for a while but didn't realize at first that it was the Night Skin.
I suppose there is an ingredient in the product that gives it that smell.