Filipe is a great host, and provided lots of very useful information and literature about Porto and the surrounding area.
The apartment is a great size in an area with lots of amenities. It is very near the main bridge connecting to Porto's historic centre and right next to a Metro station.
Staying on the Gaia side of the river puts you in the best place to visit the port houses, and the apartment also has a nice view over the river.
I would recommend this apartment to anyone visiting Porto.