The apartment is right beside the Atocha train station. It's super convenient if you want to overnight between a flight and a train ride. It's a very short walk from the botanical gardens, the art museum (buy tickets in advance) and a huge number of restaurants and bars. We were really pleased with the level of soundproofing against the outside. It's right above a very busy road, but we didn't find the noise to be intrusive or affect our sleep. The walls between other units in the building aren't so well sound proofed, but non of our neighbors were loud after bed time, so it wasn't an issue for us.