To set your expectations, all of Havana is really run down and in decay, with a few exceptions. For most of the rest of the world, it would basically be a slum. But its people are really friendly and upbeat, there is great music to be found, and the seashore is great.
This is a bed-and-breakfast with just two guest rooms, in one of the more decayed/slummy sections of town, but it is in walking distance to the sea (about 8 blocks) and the city center (about 15 blocks). The hosts are very friendly and gave us a couple of free drinks. But this is not a fancy place. You have to carry your bags up three flights of stairs, and there are exposed wires (including in the shower) and threadbare furniture. There is A/C in the room, which would be nice, except that it blasts at such a high power that we were freezing, so we had to keep turning it off, and then on again when the room got stifling (no window). Also, the pillows had no pillow cases, which is probably fine, but made me worry about lice since who knows who else used those pillows without a pillowcase.
Breakfast is not included in the price, and costs $10. It was very tasty.