We really felt like home at Mafalda's apartment and communication was seamless with her and Joao. Spent more than a week working remotely and visiting during the evenings and weekend. The apartment was perfect for that, the internet speed was good.
The only thing you need to be aware of is taking some good ear plugs for a good sleep. The street in front of the apartment is quite busy even during the night and very early morning, so there's some noise. The owner said that they'll replace the windows with modern ones with better isolation so things will be better in the future.