This studio is located in the heart of Porto, it was so easy to get around and visit places! I often took a little break in the studio during the day because the studio is in the middle of my walking route from place A to B.
Elsa & Rubina are very responsive, I had to contact them (once called, once Airbnb message) twice during my stay and they responded very quickly and resolved my issue.
One note is that the building itself is not new. For example, the toilet flushing power is not great and it was clogged for the last two days of my stay; I guess it's common in Europe since there are a lot of old buildings. And I could hear construction sounds pretty vividly and I couldn't sleep in (no double soundproofing).