I just spent three months (December through February) staying at Sandra's apartment, and I am happy to give it a very positive recommendation.
1. Neighborhood. The neighborhood, in my opinion, is ideal. It's a gentrifying, slightly funky area that may well have you cultivating real estate fantasies. The elevation is just above the plain between the Mouraria and the Bairro Alto neighborhoods, so you can decide for yourself how much hill climbing you want to do. Even if you stick to the lower elevations, you are within minutes of a supermarket and tens of wonderful restaurants. Over time I developed a circuit of favorite restaurants for pizza, seafood, sushi, risotto, etc. I also had a weekday bakery for café com leite and a pastry, and another one for special Sunday treats. The location is also ideal for transportation. The famous 28 tram line begins two minutes away, and a four minute walk will take you to Praca da Figueira, with a Metro stop and the terminus of a number of bus lines.
2. Apartment. The apartment is small but well designed, attractive, and comfortable, with everything you need. I was very happy there. Most of the time I was on my own, but my partner visited for two weeks and we were quite comfortable. One of my best memories is of yelling out the windows and out the door to the neighbors at midnight as 2021 turned into 2022. It was one of those special moments.
3. Landlord. Sandra is wonderful. She goes out of her way to be helpful and to make you comfortable. And she cleans the apartment!! I could get used to that.
So, I give it 5 out of 5.