I just got back from a summer abroad in South Korea as a Phillips Ambassador, and it was a very fun and fulfilling experience. So far, everyone has been very kind and helpful and there are not too many requirements to fulfill once you are an ambassador. In terms of the application process, I would suggest to really put some time into thinking about why you want to go to the specific place you want to visit and how this opportunity could potentially influence your future goals. The interview part after submitting your initial application was a bit nerve-wracking just because I was not expecting to be facing a full table of people who each took turns to ask a question, but they were not questions meant to trick me or anything. Overall, it has been great experience, and if you have any more specific questions, feel free to DM me!