Daniel's studio flat is close to both the city as well as the river and potentially Gaia, Porto's suburb on the other side of the river.
However, there's been a struggle in terms of communication because I haven't received any reply for almost 2 months and Airbnb had to step in to speed up things. It's been frustrating the least.
Also, please bear in mind that there is no heating in the flat whatsoever.
Other than that, all good, decent value for money.