We had a really nice stay at Gonçalo’s. The place is a bit off the center yet walkable - you will reach it within 30 minutes plus you can explore the non-touristy part of Porto. It is also close to the airport - we reached it within 40 mins by metro and only 20 minutes by night bus when we went home. Every day, somebody also popped in to check the cleanliness of the common areas which was great. Thanks again for a lovely stay!