Derwent was the first stop on our 10 day trip to South Africa, and the best (and cheapest) of the four places we stayed (and I include the Mount Nelson) in terms of value, friendliness of the greeting, rooms, service and common areas.
We were helped with car hire, airport pick up, and asked each morning what we were planning for the day so they could make any bookings required. They even lent us an adaptor plug for the week. We stayed in two rooms, a ground floor room with a jacuzzi (great fun) and an upstairs room with views of Table Mountain and a large terrace. Both were very comfortable (if on the small side - that's the only possible negative really).
The lounge, pool and terrace areas are beautiful, bathed in sunlight and deeply relaxing. I really can't recommend highly enough - we'll be back in a shot.More