I had the pleasure of staying at Marta's house when I visited Cienfuegos in January 2016 and she is the consummate hostess. Her house is super clean and perfectly appointed. It's walkable to all that the city has to offer. And if you need it she will find it. She was able to find me a masseuse. A driver. And lodgings at my next stop in Las Tunas.
The room has an attached bathroom, that's all yours and it has everything you need including hot water.
You get your own room with AC - closet space and your own bathroom.
Access to the house is secure. You will be given a key to the main door as well your room.
Interaction with guests
Marta and family are around as much or as little as you'd like during your stay.