It's been just great!
Inês and Samuel are kind and supportive hosts and the apartment was clean, quiet, and I found everything I was looking for. I loved the area Sao Sebastiao since when I was a student and it hasn't changed. You'll find great restaurants with more than fair prices, grocery stores, a magnificent park, direct access to 2 metro lines and a third one if you walk a bit longer. I love the areas quiet - the blue line will always take you to more crowded locations in a matter of minutes.
You'll have a great stay at this place, I'm sure!