Neiva is an amazing host. She was there soon after our arrival and spent a lot of time informing us about the local area and BA in general. There were city maps, bus routes and even a Subi card ready for us to load and use on buses and trains. She then walked with us to the nearby plaza and showed us where we could buy water etc. she really is a super host and stayed in touch with us during our week long stay to make sure everything was fine. San Telmo is a great location, not so many tourists and excellent free tango and other entertainments in the plaza. Highly recommended.