The place is exactly as shown in pictures - super clean and comfortable. There's just enough space for 2-3 people comfortably, and lots of natural day light.
Pedro was super helpful, and offered to provide airport pick-up services, which is great for people who don't want to deal with the hassle of figuring that out on arrival. He was there to meet us at the apartment when we arrived, and introduced us to the apartment. He also spent lots of time describing to us the surroundings, and the tourist locations, and what there is to do, and provided us with a map on which he circled the main attractions. And even more, he left us little welcome Portuguese snacks and drinks, which was super sweet, and such a great way to try the local snacks right on arrival.
Location is great, as it is easily walkable to pretty much all the main tourist locations and restaurants (5 min walk to Cafe Santiago for francesinha, 15 min walk to Luis I bridge, 8 min walk to Cafe Majestic, super close to several beautiful cathedrals). There's also a cafe/restaurant nearby with amazing savory pastries just less than 5 minutes away, called A Loja dos Pasteis de Chaves (the vegetarian one is super good, or if you prefer meat, the original Vitela/beef is great too).
The only slight downside is that the family living above has a kid, so sometimes during the evening, you can hear the kid running around upstairs; and general sound barrier isn't great throughout the building, cause you can hear people talking in the hallway at times - but it is what it is.
Overall, it's still a great place to stay - 10/10 would recommend it, and stay there again if I'm ever in Porto.
Thank you again, Pedro! :)