Casa Amarella was an ideal location for visiting Porto -- right in the city with walking to literally everywhere, while also being private in a small alley which kept city noise at bay. The apartment is just a half block from a pastry/coffee cafe and a little further around the corner to more of that and loads of shopping. I found myself at Fabrica da Nata each day because their pastries and breakfast sandwiches were delicious.
Our hosts communicated efficiently without delay and were patiently waiting for us when we arrived in Porto later in the evening. They were armed with a great map and lots of suggestions for us to take on the next day.
The space itself was clean and seemed well equipped with the basics, although we didn't cook. The main living/kitchen area is small but fine for a couple of people. The only lighting in the place is ceiling lighting with no dimmers, so the atmosphere felt a little stark in the evenings with the bright overhead lights. There are no luggage racks in the bedrooms or main space but I've made the suggestion that they add them. Overall our stay was fine.