I highly recommend staying with Andrea. The apartment is located in a nice and safe building at a busy street in a very safe area with excellent transportation connections anywhere. I walked to most places, but there are buses leaving right in front of the house and the Subte (Buenos Aires subway) is just a short walk. Even though the house is located at a very busy street, the apartment is very quiet - to the point that I slept with window open a few nights when the temperatures allowed. The room is spacious, nice and clean. Additionally, you have your own private bathroom which is very nice and new. Overall, I found everything to be exactly as described, including a well functioning reliable WiFi connection. On top of that, Andrea is a great host! I very much enjoyed my stay.