If you are planning to stay somewhere near Porto I can really recommend Maria's flat in Maia.
Maria is amazing. She is the warmest host I have ever met. Her flat is beautiful and super clean with very comfortable beds and a lovely bathroom.
It's about 40 min by metro to the centre of Porto and the station is about 10 min walk from the flat. The area is peaceful and quiet- a perfect place after a busy day in Porto.
Maria treated us like her friends from the first day and she will stay in our heart forever