This is really a fantastic place for one or 2 people (a couple). Small but perfectly adequate with a very "separate" feeling from the main house (although it's attached, with the house being on a hill, the room is on a separate level with it's own entrance).
The location is amazing, with a view of the ocean. The area is quite hilly, so walking even the short (2km?) walk to the beach and promenade of Camp's Bay is really only for those in good physical shape. Otherwise, the location is great as a base for exploring Cape Town if you have a car. We also had great luck with Uber drivers in the area. But note that it's probably more cost effective to rent a car if you're planning to go as far as Simon's Town, Cape Point, or Stellenbosch.
Ralph happened to be out of town while I was there, but he was still very responsive in all communication and had a friend staying in the main house in case we'd needed anything (though it wasn't really necessary in the end).
Overall, a great place to stay!