The place is located in an excellent location, bang in the city centre. Great if you want to walk around and see the city. It has all the appliances you need to cook and for a comfortable stay.
But I do have to mention some cons, it is on a main road and city centre so if you're not used to it bring some earplugs or don't book it. We stayed for two weeks and worked from home so the noise did started to get annoying after awhile. Although, there's laundrettes outside the apartment doesn't have one which is a minor inconvenience.
Otherwise the place was clean, Luis the host was friendly and the location is amazing for a few days visiting Porto;