Abel's place is located in Central Havana near the Malecon. I stayed with my traveling companion in a single room with a double or queen sized bed. It had a ceiling fan, air-conditions, and ensuite bathroom. The ensuite bathroom was built inside of the room, like a literal water closet. Small but it worked pretty well. The toilet ran a bit slow. There's not actual closet, but there are some built in cabinets and a safe as well as a refrigerator stocked with water, soda and snacks.
The staff is very friendly and helpful at Abel's. There is someone there 24 hours a day, which is terrific. They give you a map and point out important sights nearby when you get there. They also have restaurant recommendations and will help you get tickets to shows if you ask. They also helped us with travel for the next leg of our journey, calling the airline for us to confirm our flight and trying to help us make arrangements for our stay in Santiago de Cuba.
The room is cleaned daily and stays very tidy. Overall, this was the best place we stayed during our entire trip. The breakfast is great (a plate of fruit, eggs, bread, coffee and fresh squeezed juice) and you can take it on the fantastic rooftop terrace or in the dining room, which has a lot of fans. They are happy to let you store your luggage there for a few hours if need be as well and will basically do a lot to ensure your stay is good. They even changed money with us at a rate better than the banks. I highly recommend!