The apartment is in a stunning historic building in the centre of it all! Just steps from Praça do Comércio, you're really in a great spot for exploring Lisbon on foot. The famous 28 tram is right outside as well, so if you don't feel like waling, it's very easy to hop on the tram. Being so well located does mean that you have a little more noise (typical city sounds like cars honking and sirens wailing) and there is a bar right below that played booming music late into the night on the Friday. No bar noise on Saturday or Sunday night though.
Communication with Maria was flawless. She was quick to respond and very helpful. We were a little delayed getting in, and she had someone meet us right at the apartment for check in. It was great!