The apartment is in the perfect location for visiting Lisbon and is gorgeous inside. It has a wonderful "old-world" charm, is very clean and is decorated beautifully. The kitchen and bathrooms are modern and lovely. The apartment is equipped with everything you will need for an enjoyable stay in Lisbon. There is no elevator in the building but the stairs are manageable so this should not be a deterrent.
Samuel also allowed us to drop our bags earlier than the check in time so that we did not waste any time sightseeing. His communication was excellent. I highly recommend staying at his flat.