We stayed for only one night in Porto. The apartment was just what we were looking for, something right in the middle of the old town, however it did not accurately match the description 100%.
Pros: Carolina was extremely communicative and check in process was smooth. The apartment is right in the middle of the old town, near the river, port wine houses and restaurants. Loved the balcony and spaciousness of the apartment.
Cons: Internet connection was extremely weak and it was difficult for us to even check emails and keep up with work. Though there was a sofa-bed in the living room, no extra sheets or pillowcases were provided. The shower head was broken, as was the doorknob of the main door.
Overall, our stay in Porto was short but pleasant. I imagine that some of the negative aspects of the apartment would have affected us more if we had stayed longer. But since we were only there for one night, Carolina’s apartment was a great base to see the beautiful city.