We had a really nice stay, the apartment is very conveniently placed - walking distance to the city center, to the train station, and 5 min to the metro if needed. Pedro and Susana are very welcoming and fast to respond to any questions. They also propose some recommendations about the restaurants, etc. that we found useful.
As others mentioned, any sounds from the street are quite well heard in the apartment. So take ear plugs with you and then no problem.