Isabell is a German woman who has lived in Rio for many years, speaks the language fluently, and actually lives in the favela. She is passionate about the favelas and their culture, and she is very obviously well-loved and accepted in this close community. She gives you an excellent historical background of the favelas while also highlighting the history and evolution of modern day Rio/Brazil. It is truly an insider's look at these amazing neighborhoods. There were four of us in our group, and we all agreed it was the best part of our trip to Rio. I wish we'd used her other tour services as well since our other tour guide was not nearly so passionate or interesting. With Isabell, it doesn't seem like she's doing a job - she's doing something she loves. Wear comfortable shoes and be prepared to spend many hours walking. It's worth it!!