We stayed here 3 days in February 24 and enjoyed the really Central location, just 2 blocks from Plaza Vieja and the Rum Museum. Old Havanna is all in walking distance, Capitolio is a 20 minutes walk. Super friendly staff consists of two teams (all speak English), changing every 2-3 days, who are all helpful with really everything you need to survive Havanna. Really good cappuccino with refill and tasty egg dishes. Water bottles are available for a little charge from the semi-public fridge. Tourists from other Casas came to enjoy breakfast and stable Wifi here too for a good reason.
From the terraces in the 3rd and 4th floor we had a great view over the city, and in the 2nd floor "lounge" we enjoyed drinks in the evening. There were no flies or mosquitos while we stayed here. Actually we even returned for 2 more nights before leaving home, because of the nice atmosphere and the helpful people there.