I have been staying for a week at Carlos' place. He was very nice and available fo the check-in. The location is pretty good, close to the metro 2, 3, A,C stations. The room is a bit noisy both for the cars passing by and for some people on the house who go in and out very early in the morning and late at night but I was able to sleep well overall. It is a good place for people looking for a cheap room to spend some time in the City.