My family and I stayed here for 1 night.
Pros:
Fantastic location. Everything good in Porto is literally within walking distance from the house. If you drive, there is even a cheap overnight carpark right next to it.
Space: it is spacious for a big group of people.
Cons:
We had a security breach at 1am at night- a group of men carrying beers entered the combination lock to the apartment and opened our main door and entered the apartment. When they saw us inside they walked away, claiming that they had mistaken it to be their rented apartment upstairs. Make of it what you will, but we immediately felt unsafe. Their story was that we did not lock the door, but I was standing by the door inside the house and watching and hearing the combination lock being entered and turning before the door opened in front of me.
The photos are not as accurate as one would like them to be. They make the apartment look slightly newer and fresher than it is in reality.
Apartment is not as clean as most of the Airbnbs I have stayed in.
Rooms on the right side of the apartment by the main road are quite noisy, and my sister could not sleep till 5am (of course this is subjective to each individual's ability to sleep in noisy conditions, so if you are a difficult-sleeper, avoid)