We had a very enjoyable stay at Sandra’s house. The location allowed for easy walking to many of the most interesting tourist sites. The house was fine for us as a couple, but would be tight more than three adults or a family with one or two small children. We particularly enjoyed the terrace as a place to eat our home-based meals with a great view. She met us when we arrived and showed us her window system, which truly does silence the outdoor noise, which would be a problem otherwise.
We were also grateful that Sandra directed us to the restaurant Ze da Mouraria, a great spot for traditional Portuguese food at amazing prices. It is right around the corner in the nearby alley. We would probably not have gone in without her guidance. We enjoyed our lunch there so much (the neighborhood restaurant is lunch only) that we went to their dinner restaurant later in our stay and had a great meal there also.
If you want to cook, the neighborhood is not very well stocked with markets, however the Mercado de Arroios is just a couple of stops away on the Metro and easy to get to. I wish I had found it earlier in our stay, so maybe this will help you. Selection there is good, and the prices are great.