Eduardo's place was in a very central location in Porto. Close enough to the river front and several of the major streets with restaurants and tourist sites nearby.
Check-in was very easy and quick. Our train was running a bit late so we arrived later than we had expected, but we were able to message Eduardo to let him know we’d be late. He got right back to us and let us know that Ester would be there waiting for us when we arrived. Sure enough she was right outside when we got to the apartment and helped us take our bags up to the room. She gave us a quick tour and answered all of our questions. She even confirmed our taxi arrangements for when we had to leave Porto.
The apartment itself was a little smaller than we had expected based on the pictures. Fortunately we did not spend very much time in the apartment during our stay, but even for two people there wasn't much space to move about. The only real negative we had was the bed itself. The mattress was very soft and you could tell it was somewhat old, which did not make for the most comfortable night's sleep.
Also, it's worth noting that the apartment is on the third floor and the stairs are very uneven height-wise, which made walking up and down the stairs with luggage rather challenging.
Overall, we really enjoyed our time in Porto and Eduardo's place met our needs.