Catarina's flat is the best Airbnb I have stayed at -- the flat is well laid out and tastefully minimal in decor, making for a very comfortable stay. It is also the cleanest Airbnb flat I have stayed at and I am pretty fussy about cleanliness. I stayed at Catarina's flat with my 2 cousins and the the individual rooms with the on-suite bathrooms scored high points with all of us. There is another full bath downstairs if you have additional guests and need to use the pull out sofa. A washing machine plus a drying rack is available along with an iron and ironing board if needed. The flat cools down quickly with the AC units and even with us using the showers at the same time, there was no loss of water pressure or hot water. It's also at a very convenient location for the Metro since it is just one train straight from the airport and the apartment is right outside the Trindade stop. There is a nice view from the flat and the neighbourhood is quiet at night which might not be the case if you stayed closer to the river. It is a quick 10 - 15 minute walk to most of the attractions in Porto. I highly recommend Catarina's flat if you are looking for a place in Porto, she is prompt on her responses and will make sure you have a wonderful stay!