We stayed in Antonio's apartment for the month of August 2017. Our only caution to future renters is to be aware of the cleaning fee which we felt was a too high.
The location is great for access to the metro, bus, or a short walk to the action. We felt very safe in the neighborhood and within the apartment. The wifi works great and the apartment has all the basics that you need.
Antonio waited for us, long after the scheduled meeting time, to check us into the apartment and show us where things were. We really enjoyed our stay in Porto.
We would rent from Antonio again.