Stop browsing listings and book this airbnb immediately! Seriously, my favorite that I've ever stayed at.
THE LOCATION: In my opinion it's in the ideal part of town to stay in, a short walk to the historic landmarks/tourist attractions to the north, and Gaia across the Douro river to the south for port tastings and cellar tours. Not to mention Ribeira, the actual neighborhood it's in, is super lively and fun--and yet we were never bothered by any street noise when going to bed!
THE APARTMENT: The pictures are accurate. The view is breathtaking and having a glass of wine on the balcony will be one of the highlights of your trip. The cleanliness and amenities of the apt were even better than hotel standards; the apt comes with nice touches like a Nespresso machine, a carafe of water awaiting upon your arrival, shower gel in the bathroom, etc.
THE SERVICE: Again, even better than hotel standards. They were proactively communicative, check-in was super easy (self-service via a lockbox and door code). If you arrive before check-in time, you can go to their reception storefront nearby and store your bags. I was annoyingly high maintenance and needed to access my stored bags several times to change clothes before check-in and I never felt like I was being a bother. They were soo nice and I was impressed with how smooth of an operation they run.
Seriously, book this place!