Four of us shared this apartment for 8 days and found it big and comfortable - the only thing was the 64 stairs to climb everyday - it gave us a good workout. It is close to bakeries, grocery stores and restaurants. You could walk downtown, take a cheap taxi ride or hop on the Anjos subway station which is a couple of minutes away and go anywhere in the city or take you to the train which will take you to the beautiful cities of Estoril, Cascais and Sintra.
Luis made himself available to assist in anything, but we did very well on our own. We found that some taxi drivers spoke English and so did many people in the stores.
Overall we had a great time in Lisbon without any issues and would definitely visit again and stay at Apartment 3. Enjoy your stay.