The host - Monica - has great attitude, is very helpful and you can contact her almost any time and get immediate response. There are three rooms available - bedroom, living room and the kitchen. You have also access to a tarrace and a little sweet garden. Place is clean and comfy. It has an overall feel-good vibe. Kitchen is filled with needed equipment and has a great view on the Porto and river. Localization is good, just 5 minutes walking from metro station and nearest supermarket. I did not have any problems with parking a car next to the building. Monica is flexible - she let me stay little longer because of the flight in the middle of the night.
I can only mention one disadvantage - we visited Monica in March and weather was quite bad (rain and low temperatues) and because of that building was very cold, only in bedroom heater was available.
All in all I recommend staying at Monica's house and definitely will come back but maybe in warmer time of the year :)