We highly recommend Joana's place for your stay! Joana was so nice and gave us a lot of tips about the neighbourhoods to visit and what to see in Porto, and was quick to respond to questions we had. The apartment was great and had everything we needed for our short stay. The location is perfect and we were able to walk everywhere in the city easily. The apartment overlooks a square that was busy at night until 3am, but it didn't bug us - just a warning if you can't handle any noise. Thanks, Joana!