Ignore all previous negative comments !! This Dar has a new management and it is marvellous to stay here. The service is outstanding, the setting is amazing. The staff is so helpfull: they make restaurant-reservations, help with getting around in Marrakech (call taxi, give free map,...) and really know how to pamper you: you can get food any time you like, served anywhere you like: the roof-terrace, in your room (we had the Harim-suite, recommended !!!), nothing is too much to ask.
Unfortunately my wife became a bit ill, so the nice people from Dar Al Sultan arranged a doctor and even went to the pharmacy for us.
The price for this Riad is honest if you consider that we were allowed to stay untill the evening of our last day, in our room (we had a late-night-flight), without paying more. No extra fee for the use of a safe (the room doors can't be locked and this is an experience we had to get used to). This Dar is located a 10-minute-walk from djemaa al fna an 5 minutes from Palais La Bahia and El Badi. The weather in march is fantastic: 25 °C, sunny but not to warm, the evenings are a bit chilly. Don't forget to dine once in the Dar Al Sultan, they really know how to cook a nice meal, for a reasonable price: 30 euros for a 3 course meal.