I have used them in the past and this is what I can recall. You do not receive your e-tickets over email, it is just in the system and you go to the e-ticket desk for the airline you are flying at the airport with your passport. I would suggest printing out a copy of your itinerary from their "my trips" section of the website, and having this with you. As long as your ticket is listed as "issued" you are okay. I also felt the process was a bit confusing at first but it worked just fine.