We had a lovely stay at Fernanda's studio apartment in Porto. The location is central and near to everything, but not too close to the nightlife streets so it was generally very quiet. Check in was easy, and the apartment was clean and well stocked with kitchen items should you wish to do any cooking at home. We happened to stay during a warmer week in October, and having AC was a huge perk. The terrace was also lovely to sit on for some pre-dinner drinks or in the morning with a cup of coffee.
Fernanda was a lovely and accommodating host, even with our odd flight/arrival and departure schedule. She checked in during our stay to make sure we had everything we needed, and helped arrange a car to the airport for our very early departing flight. She also provided a list of recommended activities and restaurants in the area, which was very helpful for our itinerary planning!
There was some construction across the street, so if you are a light sleeper it may be worth checking if that will still be ongoing during your trip. Otherwise, our vacation was fantastic and we would highly recommend staying with Fernanda.