I highly recommend this apartment!
Is in the city centre, close to everything, and Diogo, Daniela and Artur had been incredible guests, they gave us recomendations of restaurantes, places to visists and also places to keep or bagage.
The apartment was cozy, clean and very confortable (the only bad thing that I should remark, and I'm conscius that the owners couldnt do anything about it, is that they were doing works in the building oppsitte, and during the working hours, there was a bit noisy)
I would come back to the same place for sure if I´ll come back to Oporto.