Our family of three stayed at Casa di Rio for a week during our trip to Lisbon and the experience was excellent! Joao greeted us on our arrival and helped us with any information regarding the building, transportation and visiting the city. The apartment was clean, had good wi-fi, a washing machine and all kitchen amenities. It is in a quiet neighborhood with a bus stop just at the door and easy access to the metro. The beautiful bairro Alfama is just close by, with a Tram 28 stop. You can watch the sunrise over the river from the apartment window, it's a great way to start a Lisbon morning!
Joao is a truly excellent host and I recommend the apartment to anyone visiting the city.