All I can say is that if you are staying in Porto this is the right apartment to stay in; this apartment is excellent value for money.
Let's start with the host.
Salomé is an excellent communicator, very responsive and attentive, I did not meet her but met her husband Pedro, who helped me get my stuff into the apartment, gave me a detailed guide to the apartment, and the local area, letting me know where various shops etc where, and was just generally super helpful and kind.
The apartment.
This really is an excellent place to stay. The apartment uses its space really well, and you have everything you need for a long term stay or a short weekend break. There are lots of nice thoughtful touches to the whole house, from how the bathroom has the shower set-up, the fact that you have both heating and air-conditioning units that are modern and work really well to the bedrooms where you have more duvets, blankets, and pillows than you will ever need, to the internet, which really is superfast, has both WiFi and 4 ethernet connection points. At night, you will be able to get a decent bit of shut-eye as it is quiet (for those of you who like nightlife - don't worry it is 5/10 minutes away). There's always hot water, the building and the apartment are in very good repair. There is a bus stop almost right outside that can take around the north side, or very conveniently to the airport, so depending on the time of your flight no need for Uber or Taxis. On the last point once you have the name of the street all Taxi drivers know exactly where it is, so when you are arriving late at night at Porto Airport, you should have no issues getting there.
The location
The location is central, and you have everything - literally - you need within 10 minutes’ walk, supermarkets - Lidl, Pingo Doce, Continente, Minipreco; pharmacies, dry cleaners, banks, hospitals, Dr's, Dentists to name but a few of the amenities.
You can be in downtown where the bars and night life is, within 5 minutes; Nicolau Porto is 5 minutes away for breakfast and if you like good food for lunch or dinner (who doesn't), Flow is just opposite.
For amazing views over Porto that are no more than 10 mins away, you can watch the sun go down on the opposite side of the river Douro from the Parque das Virtudes with a nice cold, ice cold beer or glass of wine.
There's more, plenty more, but I hope that this is a good reference point for those of you looking for somewhere to stay when in Porto.