We had an amazing time at this apartment. At first we were a bit apprehensive as there were no other reviews, but I am so glad we gave it a go because this has been one of my best stays on Airbnb. It was a beautiful, clean, and tidy Airbnb, with literally the BEST location. It is in the center of everything and often found ourselves going back to the apartment to drop stuff off or rest our feet (which was quite often given Porto's hills :') ). Everything was a 5-15 minute walk. The host was also super accommodating and attentive and offered many recommendations. When we had a issue at like 2am, she answered the phone right away and helped us. It's also super safe!
If you are looking for a place to stay in Porto, I HIGHLY suggest this location. When I go back to Porto, I will definitely be staying here again.