It was an amazing experience to attend this event. It was long from 9 PM when I arrived to when it started at 10 PM and ended at 6 AM. Well worth it. While in Brazil, I never felt unsafe and the people were warm and helpful. I was a little concerned with all the dangers I was warned by friends in New York, but I will return again and again. Just use common sense. Event was very well structured and the tours guides were available at all times.