MyLoft is true charming place to stay in Porto. Stayed here for 4 nights in September 2017. The flat is on the 2nd floor, nice designed, clean and bright. All windows are equipped with inside-flat joints, you also have a small balcony to look up and down the street. Bedroom, bathroom, big kitchen (and big refrigerator too), drawing room - all fine and convenient, the only small complaint is we maybe were a little bit short in space for placing our belongings (clothes etc.). No problems with doors nor keys.
The flat is about 15-20 min by walk from main tourist attractions, maybe about 25-30 min to Vila Nova de Gaia restaurants and Port Wine Lodges. For restaurants I personally recommend R. das Flores street and Av. de Diogo Leite (opposite Douro river side).
If you go by car pay special attention that all streets around MyLoft has paid city parking from 8 AM to 20 PM. You can occupy parking place for no more than 2 hours this time, over night there is no charge and no time limit (read rules on the parking machine). Cost is about 1 euro per hour, you have to place a ticked under the windshield. The parking is free of charge on Saturdays and Sundays, but as I asked the policeman and Carla confirmed - max 2 hours limitation is still in place during the day on weekends if they caught you. I personally saw cars being evacuated by police from the street - follow the road signs carefully. The best and relatively inexpensive is to put a car in a closed private car part, there are some of them around MyLoft (and one just the opposite). It can be a surprise for you, but car parks (I checked 3 or 4) close at night and on weekends - if you came late, you can't put your car into (even if you pay in advance). If your car is inside and the park is closed - you can't go out until the working hours! To avoid this I do recommend "Garagem Dom João IV" car park R. de Dom João Iv 710! For 10 euro a day the owner gave me a wireless key to open the front door to go in and out any time I need. And it's very near to the apartment.
Carla and her husband were exact on time on our arrival, communicative and replied very fast when I needed some advice on car park. You should definitely consider MyLoft as you place to stay in Porto!