This is the best place you can stay in Porto! We spent multiple hours a day on the balcony enjoying the most fantastic views the city has to offer. Doing so allowed us to always be enjoying the city even when resting and getting ready. We received a free transfer from the airport to the Airbnb and check in was seamless. We did have one issue where the keypad to the main enterance did not work but they provide a physical key for this reason so be sure to bring it with you.
My friends and I agreed that if we ever heard someone was planning a trip to Porto, we would practically demand that they stay here. It is such a unique space and without a doubt made our trip.
One thing to note is that the Ribiera area has a significant amount of stairs. Those with mobility issues should note this; however for those without, it is well worth it for the views and character of the neighborhood you can experience.