My girlfriend and I stayed 5 nights at Sara's.
The apartment is extremely cute, clean and well equipped. Sara shows a great attention to details to make the place welcoming and homy.
The apartment is located in Lapa, a calm and residential area very close to the city center (Cais de Sodre, chaiado, bario alto). We did everything by foot. Also, Lapa is a beautiful neighborhood worth visiting.
Sara (and even her parents) were very helpful in providing all the information we needed, and especially tips for the rest of our trip.
We highly recommend Sara's apartment.