We had a very good stay here with our 8 month old daughter. The place was clean and organized, though a tiny bit cramped with the amount of luggage we had (our fault - first time travelling with a baby). Absolutely everything we needed was in the apartment and our host gave us plenty of suggestions for eating out and sightseeing. The apartment has many brochures and other such helpful items for anyone's first time exploring Oporto. And, an added bonus, the nighttime photos we took from the backyard and the (very safe and friendly, even after dark) garden in front of the house made many people jealous of our view.
If you're driving, be aware that this is on a one-way street. The access to this street is gained by driving on a cobblestone road that is easily mistaken for a pedestrian walkway. It's not, we promise! ;)