We really enjoyed our stay at Carlo & Cristina's place. Cristina welcomed us with open arms and provided some helpful tips upon our arrival to Porto. The location is unbelievable and you can see the Douro river, Church of São Francisco, and a wonderful Sandeman mural from the balcony. We felt very comfortable and had everything we needed in the apartment. The wifi would be great for casual browsing and normal use while traveling, but struggled a bit with more intensive work like video conferencing. If you don't have to work from home, there are many things to see just a few minutes from the flat (that can be explored while socially distancing): The Ribeira neighborhood, Clérigos tower, Sé Cathedral, Ponte Luís I bridge, and tons of Port lodges across the river. I would highly recommend this apartment if you're traveling to Porto.