It was great to stay at Ricardo's place during this week. Ricardo met me quite late at night (11 pm) to receive and show me the apartment in addition to giving some local tips on what to see and do in the city.
The apartment is perfect for a couple or a single traveler in size. Since the bedroom is in the upper floor, there is almost no traffic noise at night. And the bed madras is very comfortable. The main bathroom is also really nice and spacey. As for the location, the apartment is 100 metres from Sao Bento metro and train station, so it's very easy to get around.
Sum a sumarum the stay was very enjoyable to stay in this apartment and I would definitely recommend this place.