The cost was US$60 and covered 4 of us. You will see the rate changes depending on how many you are purchasing at a time. If you are traveling as a group, it is a good idea for one person to do this process and settle the IOUs as needed. It just makes the process smoother. You will see on this website how clear the directions are to apply for a visa. After applying and paying, they will send you an email that has an official Vietnam Visa Approval Letter. It was very prompt. The letter gives you further instructions on what to do. This is not the visa, but you can take this letter with you and turn it in FOR the visa once you arrive. There is a pdf form that they also send you, which must be turned in with the approval letter and 2 passport photos.