A great stay, Arturo and Catarina are lovely hosts and very attentive, with quick responses to any questions or issues. They gave us some great Ideas for for nightlife, food and day trips for beach towns :)
A couple of notes would be - the flat is on the ground floor (and sleeping in a downstairs area, so we wouldn't say it was a Loft design, with the roof terrace reached via another part of the building. The hot tub was also not able to heat up enough to be used outside in the winter/slightly cooler months. This was unfortunate as this was one of the main reasons we booked the apartment.
Other than that, the apartment is great, a social space and easy access to the centre area of Lisbon. A good place for a group of friends to stay together.