Our stay was amazing. They were very accomodating since we arrived after midnight. Amazing appartement, super clean, easy to reach from metro station Cais do sodre. Perfect communication. The area was very lively with lots of bars and restaurants, still inside the appartement you couldnt hear a thing.
Be ware, the building is a bit older and the appartement is on the 3rd floor without elevator so prepare for some stairs :)
Also they gave us very useful tips for the rest of our trip in Portugal.
Would def stay again :)