Natalias place was amazing. Light, fresh and very clean and comfortable. The shower was lovely and the kitchen very well equipped for your stay. It is situated just outside the city centre, you can walk, or get a very short metro to the centre. Alternatively, a taxi is around 6 euros and is on a meter. Taxi drivers are very friendly, like it seems so are all the people of Porto. There is a lovely park across the road, some good cafes and bars nearby and also, Casa de Música. As convenience stores cannot really be found in abundance in the centre, it was also useful to be quite close to a Lidl and a few others. Everything anybody would want is in close proximity, and as it is just outside of the central district, it is easier to park and is quieter, yet still so easy to get to the central area. For me, the perfect location. My group was 4 girls, and we each took a room. There are 3 single rooms and 1 double, so could also be good for a family.
Porto itself is beautiful, I would highly recommend a stay here, with Natalias place as your base.