I spent three nights at the Riad Jonan with my girlfriend in October 2012. It was our first time in Morocco and we weren't quite sure what to expect. Before our departure the staff at the Riad organised a taxi to pick us up from Marrakech airport. The journey was less than 10 minutes. The Riad was in a side alley that had construction works going on, but once inside we immediately knew we had made a good choice in staying there.
We were greeted by the staff with some mint tea (which was amazing) while we sorted out our room. They were happy to talk to us, give us some advice about the area and a hand-drawn map that turned out to be very useful! Originally we had booked a standard room, but were offered and upgrade for an extra £15/night which we decided to take. The Riad was beautiful with a lot of Moroccan character, exactly what were looking for in our accommodation. The roof terrace also provided a great place to relax - offering both sun loungers and shade depending on what mood you're in. It closes at midnight to avoid noise from disturbing residents who may be trying to rest.
Breakfast was fairly simple but really good. Along with a variety of breads, croissants and tea/coffee/juice you have a choice of cereals, omelettes, scrambled eggs. The Riad was next to the Saadine tombs which are worth a visit. It was a 10-15 minute walk to the main square/souks markets. Prepare yourselves for chaos when you visit. In addition to exploring on our own we went for a camel ride which was organised through the Riad. Probably slightly more expensive doing it this way than finding someone on the street, but we really appreciated the fact that it was hassle free and would recommend anyone to allow the staff to book trips you're interested in.
Overall, we couldn't speak highly enough of the Riad and the staff there and would recommend anyone to stay there.