Excellent location, just at Trindade station, close to everything (including public metro to/from airport). It is just off the main center (which saved us a lot of noise as there were students partying all week in the center, but not under our windows).
Old building, very nicely refurbished with lot of charm. As usual, this antique charm comes at the expense of sound insulation and you can sometimes hear the occupants upstairs. The kitchen equipment is good for breakfast and basic lunch/dinner, but not totally adequate if you plan to do serious cooking.
Ana was very caring and provided us lot of help, responding almost immediately to any questions before and during the stay.