Incredible views over the Douro River. The riverside promenade is walking, and so is the market. However, please note that the road is inclined, so if you are not drivng, you will have to walk up and down. It wasn't a problem for us. We loved it.
The studio is so well-designed with every need taken care of. There is a washing machine as well. It was very clean and the host left us a bottle of Port wine.
The only downside was that the city tax of 4€ (for two of us) was not included in the Airbnb charges and the host asked us to pay it separately.
In a nutshell, will definitely recommend this to everyone.