Honestly one of the best AirBnBs my girlfriend and I have stayed at.
1.) The Host: Impressive response time, our host contacted us within less than 30min-1hr almost every time we needed them. We booked this place ~3hrs before landing in Portugal because our flight/access to Germany was denied.
When we arrived, there was a wonderful Welcome Gift waiting for us (wine, chocolate, maps, and ideas for our stay in Porto). Check in/Out is very simple and instructions were very clear.
2.) The Space: Perfectly clean, a Unique layout (love the glass floors where the beds are), all the amenities we could need were there (and more: coffee, tea, kitchenware, shampoo, towels, extra blankets, netflix/TV, etc), and the view from the balcony was breathtaking
3.) The Area surrounding: the place is centrally located--exactly where you would want it if you want to get the best and most experiences out of Porto (all of the shops, markets, restaurants, historic sites, river, etc)
Things to note: the room is on the top floor so if you are not good with stairs just be aware (but there is a handrail all the way up)