We were very satisfied with Pedro's apartment, it's a good choice for a couple!
Location: one can easily walk to Baixa and Alfama from here (about 15-20 mins). There views are amazing and the metro station isn't far away. The only negative was that, there were a few creepy drunk men hanging out on a street near the metro station. But that entire area is easily avoidable.
Apartment: we were three people at the apartment and were very comfortable, though it's absolutely perfect for two people! There's a gorgeous little balcony that we never had the time to use unfortunately. Everything was super clean, comfy and perfect.
Host: Pedro met us at the apartment and was waiting for us even though we were very late! He even brought us some delicious bread, cheese and other condiments, which made us feel very welcome. He was available on phone for queries and was very easy going.
Definitely recommend!