My stay at Madero was excellent, the staff at the property made the experience all the more special, they were informative, helpful and super friendly; thoroughly nice people. The property itself is a lovely building with a nice, stylish interior. The room I had was huge, with a king bed, nice bathroom, big TV, aircon and a fan. The whole place was exceptionally clean.
The included breakfast was fantastic: juice coffee, fresh fruit, toast and your choice of eggs or whatever else.
The place is a few minutes walk to the rum museum and Plaza de San Francisco, and not much further to the main part of town.
They offered a money changing service which gave a better rate than any ATM (read about the money situation before going to Cuba).
I would recommend anyone to stay there when visiting Havana. Excellent.