This place is in all the guidebooks and seems to have been around forever. It's not massively easy to find as the entrance is set back from the road. In fact it's easier to find at night because of the illuminated sign. I would definitely recommend booking ahead - we went on a Sunday night out of high season but the place was packed, and we only got in because we agreed to share a table.
The decor and ambience is just right - Moroccan but very high class. Also the waitress was pleasant and friendly (though it definitely helps if you speak French or indeed Arabic.) The menu includes all the usual Moroccan stuff, tagines, pastillas and so on.
The main drawback is the price. The estimated price on here - £6 to £9 - is a joke! You'll pay that just for your starter. Our bill came to over 80dh for the two of us which works out at over £30 per head. Admittedly we did have three courses and wine, but even so, that's really expensive and I'm not sure the food justified it.
The best course was the starter - pigeon pastilla (yes, pigeon!) which had delicious flaky pastry and tasted great. The tagine was a little disappointing, though acceptable. Dessert was unexciting but fine.
Definitely a "destination restaurant" and one of the places to go in Marrakesh if you want to impress somebody, but I'm not sure it's really worth the price.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.