Sadly, We have a mixed review of this apartment. It is furnished very nicely. The location is good. The building is nice. The owner, Vitor, could not have been nicer. At our request, they washed the sheets with a unscented laundry detergent for us. He even gave us a ride down to the center of Porto. He is a true gentleman. The apartment is on two floors. From the street you walk up a flight of stairs to get to the entrance of the apartment. The kitchen and living room are on that floor as well as a bathroom and are very nice. To get to the bedrooms and a second larger bathroom, you go down a flight of stairs. They are on ground level and there is a bus stop right outside the main bedroom window. People wait for the bus (about 10 feet from the window) and were sitting there talking and also making noise until after 11:00 p.m. We had to close the window to try to sleep. The main problem was that there is a mold smell on the lower level. There is no visible sign of mold that we could see. There is stone on the window sills, and it felt cool and moist. There were a total of three air fresheners in the apartment, and we put them away as we did not like the scent. After we put them away is when the mold smell became more obvious. My wife is severely allergic to mold. After being in bed for 15 minutes her throat and lungs began to tighten, and lips began to tingle and so we went upstairs to try to sleep on the couch (which is not a sleep sofa). She is still is having respiratory problems and has had a headache since being there. I am not allergic to mold, but coughed and coughed and got lung and sinus congestion also . We called the owner in the morning and told him about the problem, and that we were leaving the apartment. He stated that no one else had had a problem such as ours. We booked three nights, but only stayed one night. We did not ask for a refund. We went to a different Air BNB property for the next two nights and had no problems . Prior to to coming to this apartment we had stayed in Lisbon, Fatima and Coimbra with no problems in any of these places. If there were no mold problem, we would give this apartment and Vitor 5 stars. if you have any respiratory issues, allergies to mold, or asthma do not stay here. It is not easy to get rid of mold in the lungs and sinuses, I am a physician and have treated many patients with mold. We are still congested and coughing 8 days later. We have stayed in many Airbnb apartments without issues , and do not like to give negative reviews or to hurt anyone's business, but these reviews are for prospective travelers who may stay here. Honesty is key. if we had known that there were any mold, we would never have booked it. I acknowledge that my wife has a mold allergy and that scents bother both of us, but the problem here is more than our personal issues.