I used it to send my letters to AAMC for AMCAS. It lets you add your AAMC ID to the shipment, too, so that you can be positive that your letters get matched with your file. I can't respond for SOPHAS, but it lets you input an address if it doesn't have the information already in their system (like it already has the info for AAMC and most of the DO schools I applied to), so I'm sure you could get it to SOPHAS, too. Mike, I hope you don't feel like I'm treading on your territory, but I figured it wouldn't hurt to let them know my experience.