This was by far the most atmospheric casa I stayed in, so far. It has lots of space, is very clean and rents out three rooms (20-25 CUC).
There are different options for breakfast, prices start at 1,50 CUC. You can also get breakfast and dinner for a price of 7 CUC. They offer different excursions and explain you everything you need to know to get around in Cienfuegos.
It`s about a 15 minute walk to the Plaza Marti in the middle of the city and only a couple of blocks from the Viazul bus terminal. There is a grocery store three or four blocks away from the casa if you want to buy something.