I stayed in Cristina's place for a week whilst working and exploring Porto.
The flat has everything one needs to feel at home (fully equipped kitchen, washing machine, kettle, cutlery etc.). The WiFi is reliable and there has not been any issues. The location is fantastic and neighbourhood is great. Big supermarket in 7-9 mins walking distance, shops, bars, restaurants 3 mins walk, historical centre 5 mins walk and all other sights etc. no more than 15 mins walk away.
Obrigado, Cristina!