Mario’s place is very central, close to the bolhao market (currently closed as it is under renovation!) and some nice bars just downstairs (big bad bank). It has everything you need for a weekend trip. It can get noisy outside due to glass containers being emptied until late in the evening, but walking all day in Porto will get you tired enough that you won’t notice. We especially appreciated the fact that we could store our luggage before checking in since our flight arrived way earlier than 15:00. All in all would definitely recommend.