I had such a lovely stay at Caroline and Paulo's place - the room was clean, cosy and charming. I loved the balcony too. It was a perfect base from which to explore Porto, in a quiet neighbourhood but with lots of great cafes/restaurants nearby. It's also a short walk to the main sites of Porto.
Caroline was a wonderful host and gave plenty of recommendations of things to do (especially since it was raining for most of my stay haha). I felt very welcome, especially as a solo traveller. I hope to return!