Ana’s place was great for our stay. The apartment is a studio with a little nook for the bedroom which faces the street (and has a beautiful view of Porto).
For summer travelers, I would mention that there is no air conditioning in the apartment (but the night time temps were fine for us in early September).
The apartment is about 15 minutes to the Ribeira and 10 minutes or less to downtown depending on where you go.
Overall, we had a great stay and would recommend the place to anyone looking for a central Porto location!