The appartment was very nice, spacious and clean. Communication with Sofia went exceedingly well. I would definitely recommend this appartment to people looking to visit Lisbon and surroundings; it is close to the train station, there is a metro station relatively close by, and supermarket around the corner. Its easy to reach the city centrum on foot, and there are some pretty nice restaurants and coffee places within walking distance.
The noises of the street don't reach the bedrooms, but I would recommend maybe bringing earplugs, as you might have noisy neighbous (upstairs or otherwise).
All in all very much worth booking, me and my friends thoroughly enjoyed our stay.