We had an overall good experience at the flat. It was equipped with everything we needed during our stay.
Check in was easy as the host gave two options of addresses to get the keys from - we arrived at São Bento train station and the place of collection was very nearby.
The flat is located in a good neighbourhood, at a walking distance to the main Porto attractions. However, it is located by a busy road, so it is quite loud even during the night.
The shower is great and the air conditioner was excellent (and very needed at night, as we could close all the windows to make the flat less noisy). We were working a few days from the flat and the wifi was also great.