We stayed at Ryad Dyor for 4 nights in October 2012, and couldn't have been more pleased with our choice. Our hosts Adil and Ibrahim were so friendly and helpful that it really made a real difference to our stay. Our room was fabulous and very comfortable (we were lucky enough to receive an upgrade on arrival), and the whole property is done beautifully. Breakfast was extensive and excellent (pastries, eggs, bread, cheese, fruit salad, local pancakes and freshly squeezed orange juice etc), and we found we didn't really need lunch later in the day.
The Ryad is located in the north medina and is a bit of a walk from the main square through the souks. It is an easy journey once you get your bearings, and we really liked to location as it is clearly a more residential area that is not teeming with tourists - you can get an idea of real life in the medina just on the walk to centre.
We wouldn't hesitate to stay at Ryad Dyor again. It really was lovely and the highlight of our trip.