Ricardo's house was in the center of the city and easy to get around. It's just a bit hilly between city and house but it is Lisbon. It is pretty safe place for walk around and there are some nice cafe and restaurants.
Ricardo was great host. He gave me a list of restaurants that local people go to. He gave me advice for my trip to Porto as well. He cared a lot about me while I was in Portugal and I really appreciate his care and hospitality.
It's great place to stay and a great Portuguese man to get to meet!