Our stay in Porto was nice, the area where the apartment is located is central and at a walking distance from everything we need, it also a very quiet area and very beautiful indeed. The apartment itself is accurate to the pictures: big, well decorated, with two little balconies facing the street and a walking area where you can leave shoes and jackets that makes a big difference since you don't need to bring them into the apartment.
In regards to the company that manages the place, there were some pretty amateur situations like asking for a meeting fee so we could receive the keys at the apartment, charging extra fees for everything and communication between us was good but falling on decent because they didn't prepare the place for a long stay like ours and only provided for 3 toilet paper rolls, 1 face towel, 2 body towels and 3 dishwasher tablets. When we asked for basic house tools they ignored or forgot our request and we had to buy things like cleaning rags, extra toilet paper, a dish sponge and detergent as well as kitchen paper, which don't really make sense when you're travelling.
The place also not that clean which in this covid 19 era is worrying.
Regardless, we had a pleasant stay if you overlook all these things.