Paula and her husband are lovely hosts, and their town house is fantastic. They were very flexible to accommodate our needs.
The neighborhood is quiet, perfect for a good night sleep. The old town and nightlife areas are within walking distance, but it takes ~20 min at a good pace. Therefore, for people who are not too keen on walking up and down, the car is probably a better option. It is pretty easy to find free parking close to the house though.
The room was very large and comfortable, and there were lots of amenities : towels, hairdryer, toiletries, and the essential to prepare a simple meal : kitchenware, spices, oil, tea etc.
I would definitely choose this room again if I come back to Porto !