We had a good time in this apartment. We really liked being on this side of the river, and very close to the boardwalk with nice cafe's and restaurants. Porto is a very hilly city so be prepared to walk uphill and downhill a lot.
The apartment is very basic, but we knew that, so if you want to do any cooking there or so, there isn't oil or spices or things.
Peter was very responsive when we needed something and his mom (who checked us in and showed us the apartment) was very lovely and sweet.
Overall we had a good time, and we spent most of our time in the city only coming back in the evenings.
Thanks!