I highly recommend staying at Mariana's house. Unfortunately she was not at home when we arrived but her roommates warmly welcomed us. The house is very clean and you feel at home there. The location is not in the middle of entertainment, but getting there by metro and buses is great. A quiet neighborhood gives you a break from a day of sightseeing. Very close to the airport, which is a big plus. Very helpful roommates, even with a language barrier, they wanted to give as much as possible. A really great stay!