We stayed in the apartment for a midweek. The central location is perfect for discovering everything that Porto's old town has to offer.
The apartment has a modern feel and is comfortable enough for two people. We did feel like the cleanliness of the bathroom could have been better and that there was not enough ventilation in the apartment. We would also like to note that the upstairs neighbour gets ready for work around 7, which can't really be slept through/ignored. This wasn't really a problem for us, but people that like to sleep in might find this rough.
The communication with Joana and Claudia was great, and our arrival and departure went very smooth.