This is a great place in the middle of Porto, lots of stuff happening nearby. The place is immaculately clean and the host, Rita, is extremely communicative and available.
It's easy to walk from here to anywhere you want to go. The Aliados metro stop is four minutes away. Except for the hills, which if you've never been to Porto before, you'll soon learn-- your calves will be burning.
I highly recommend this place to anyone staying in Porto. Of note, it is on the third floor, and it is noisy on the street at night, especially on the weekends. If you're a light sleeper, there are earplugs in the Airbnb underneath the sink. It wasn't a big deal for me, but for someone who needs things to be extremely calm and quiet at night, it wouldn't work. There are excellent shades for all of the windows and doors so light will not bother you.