The location was great for getting around Porto. The old city centre and the port houses across the river were walkable. Additionally there is a bus/tram stop right in front of the building so both train stations were accessible via a single bus trip.
Our host communicated well and checked in with us via WhatsAp to make sure everything was going well, and responded very quickly to questions.
The apartment is compact but very well equipped.
We found the beds moderately comfortable. They are likely from Ikea as we have found in many of our European stays. The mattresses could be thicker and the beds are very low to the floor. I am 5 feet 4 inches tall (162 cms) and the twin beds were lower than my knees.