Tiago's place is in the neighborhood of Foz, which is a very quiet residential area, slightly away from city center, but still very accessible by public transport.
To be honest, if you want to enjoy a Porto lifestyle, and live like a local, then it's much better to stay in this area than the touristy city center.
Apartment is good sized, clean, well designed. Literally steps to the ocean.
Tiago is very communicative and helpful.