The house is bright, smaller than the photos but still a decent space, and has almost everything you would need. Including tons of towels and kitchen wares and also almost everything you'd need when cooking. (though 3 toilet paper rolls for 3 of us staying for 8 days were not enough but it's not expensive to buy our own rolls)
Staying at this house made us feel like home.
Sandra & Yazid weren't in the city when we visited but their neighbor Rita who lives upstair and helped them mange the house has been a great help. She's kind and warm and easy to communicate with, and also responded to our questions in a second (also Sandra & Yazid .)
The internet in the house didn't work while we were there, but Rita provided us her wireless access so it's not a problem (just sometimes the signal was week in the bedroom.)
The location is (or felt like) in the center of Alfama and close to 2 stops of different metro lines, which may be great for most of the people. But we spent almost the whole day every day strolling in the city famous for its hills and slopes, so the last part to get back home required a good walk up or down the hills was like the last straw for us sometimes. But for some people it might be the taste of the local lives.
But still, we had a great time in this house.
We visited Lisbon at the end of the year. It's quite cold so we didn't have to open the windows. But there's once we opened it for a short time, 3 flies flew in right away. Wondering how it's like during the summer.
We had good heaters. But the stove is also electric one. And it's an old house. Which means we couldn't use the heater and stoved+oven more than 3 at the same time or the electricity would go off. It happened several times even though we were paying attention to this problem. But it happens to every old building in Portugal. So it's another experience of local daily lives as well. If you don't plan to cook at home that much, or to visit Lisbon during the winter, it should not be a problem for you.
Overall, we enjoy the stay at the house and appreciate Rita's help.