The whole apartment feels more like a living community with a wonderful host. You have your privacy in your room and can meet other people in the shared kitchen or living room. I stayed 10 days and it fits my needs totally. The room is small, but sufficient if you exploring Lisbon during the day. And it has a fantastic view! Great to wake up and you can directly look over the river mouth.
If you feel cold very fast, maybe it isn't your place in the winter months, because the room has no heater. I was there in November and it was not so warm in the room during the nights. But if this isn't a problem for you, it is a great place.