Carlos & Cristina welcomed me very warmly at their apartment. The place is located right at the river very close to Ribeira where all the cafes and tourist spots are. It's not far to walk to the Sao Bento metro station and the actual city center.
The place is on the 4th floor so a bit of stairs climbing is needed to get in. The area is quiet during the night and it's no problem for a good night sleep.
Everything needed like a coffee machine, microwave, towels, shampoo etc. was there.
I enjoyed the stay a lot and would stay there again if I came back to Porto.