Highly recommend the flat and location for a trip to Lisbon! We stayed there for a month whilst having to work from home and it was a great decision. Principe Real neighbourhood has plenty to offer, from small local tascas (typical restaurants) to more modern and creative places. The tascas have great daily menus for 6.50EUR (including wine or beer!) which made it pointless cooking from home much. The parking is a bit of a nightmare in central Lisbon without a permit but you really don't need a car if you're sticking around as it's easy to walk around (albeit hilly!) and the Ubers are extremely affordable.