Location-wise, there's no doubt about it -- This is the best location in town! The building is right on the Prado, the "Champs-Elysées of Havana". It's just minutes walk from all attractions in Habana Vieja and Centro Habana. Malecón is right downstairs and the Capitolio is 10 minutes by foot! Magnificent view from the windows. It's very safe to walk at night. A very pleasant neighborhood!
Fefita and Luis are a very warm and friendly couple. They make you feel like home! They care about your safety and comfort, they give you good advices on your sightseeing, trips and your general stay in Cuba. They are very caring. Small things such as leaving the light on for you if you come back late at night, make you feel warm.
They recommended me to a "casa particular" in Trinidad. They asked that family to come pick me up at the bus station. And as soon as I arrived in Trinidad, that family already knew that I like fruits for my breakfast! It's really touching!
The only down-side is the noise in the street. Prado is a busy street with heavy traffic 24 hours a day. If you are a light-sleeper, ear-plugs are a must.
I highly recommend the Casa Fefita y Luis for anyone who visit Havana and want to stay at a nice casa in Habana Vieja!