Stayed at Sandra's place for a week, and we really enjoyed it! The apartment is very spacious and bright, there are two terraces where we enjoyed some sun even in February :) The location is in the heart of Bairro Alto, surrounded by a ton of cafes, bars and restaurants, in a short walk to all tourist destinations, and the price is super nice for what you get!
Sandra was very welcoming and gave us very useful travel tips. Even though there were small issues with amenities, she was helpful and I would definitely recommend this place :)