Elissandra is the best AirBnB hostess I have ever had. She gave me a thorough tour of my room's amenities, the bathroom, dining room, etc. She had maps and brochures of Porto available.
The room and the common areas were all very clean and welcoming.
And breakfast was a cornucopia of foods.
Her apartment is very convenient to the University of Porto, and the Old Town is a ~20 minute walk.
I highly recommend this listing.