Ricardo is a super friendly guy, a great host and his place is just super! It's beautifully furnished and decorated, very clean and well equipped. A whole rack with flyers and brochures gives you a good idea of sights, museums and anything you might want to see in Lisbon. Finding some fruit, coffee and beer in the kitchen when we arrived was a nice surprise as well. The location is very central so it's easy to explore the city center by foot or to access public transport. There are many restaurants and bars in the area, so it gets kind of loud at night which didn't really bother us at all, but if you are a light sleeper the people partying on the street might be a little bit of a problem.
For us however, staying at Ricardo's was a real treat and we enjoyed it a lot!