We really liked staying at this house. The house, from 1906, is incredible. Obviously, a house like this needs a lot of maintenance and there are some things that you be improved, but absolutely nothing that disturb us.
The bed is comfortable. The room is clean. The location is quite good. 5 minutes walking from the subway and 15 minutes to the heart of San Telmo.
The isolation is not good so if you are sensitive to the noise (from the street) maybe do not book that. It did not bother us. Also the house is very big so it almost look like you have the palace all for yourself :)
We recommend!