I am stationed overseas and have an old computer (Samsung NP-RV520), circa 2012. My current power supply quit working and I needed to find a no-kidding replacement that would require me to guess at what I'm buying. Mail takes 7-10 working days to get here so I don't want to take a chance that my purchase would have to be returned and simultaneously reordered. Your product listed my exact computer and you ship to APO addresses, which is a tremendous relief; not every company will mail to an APO because it takes a little bit of paperwork. So, for all you provide in terms of product and service, I thank you.