We planed to stay with 6 people at Pedro's place, but two friends joined us, so in the end, we were 8 people. The change of the reservation was handled in minutes by Pedro. The communication before was perfect and he welcomed us personally and show us the apartment as well as gave us a lot of useful tips for the quarter and the city.
The sleeping rooms have additional windows that block the noise of the city quite well. They are sufficiently big and we slept well.
The kitchen is equipped with the necessary items.
You can walk to the market in about 3 minutes and it opens up from Monday to Saturday and has (almost) everything you need.
The metro station is just two blocks away, but you can also walk to most tourist spots you want to see.

Overall we had a great stay and will surely come back to Porto and this apartment.