Eugenia and Luis's place was very cozy and had a nice view of the oldest street in Porto. We were greeted with a glass of port while Vania went over the details of the apartment and places to eat nearby. We were also given a glass of port and had fresh local pastries delivered at our door every morning! What a treat! The apartment is centrally located between the Sao Bento train station and the river waterfront. The Porto Cathedral was just a short walk out the back door of the building. If you have your windows open, it can be a bit noisy with people passing through the old street. However, the sound proofing for the windows is great and once you close them virtually all noise is blocked. The door to the apartment is a bit thin however and you can hear people walking up and down the stairs. Not to worry though, it's only the people who are staying in the apartment so you don't hear that often. The apartment was clean and the bed was comfortable. The bathroom was a bit small and you will only be able to fit one person in there at a time. Note that the apartment is on the 2nd floor and you will need to climb steps. There is no air conditioning but they do provide two fans.
In summary, I would highly recommend Eugenia and Luis's place if you are coming to Porto.