The most amazing place that I have been to, especially given the cost. The service was top-notch... I wouldn't be surprised if they offered to drive us back to the States. The room was clean, the atmosphere was electric (but quiet when we needed to sleep), and the breakfast was amazing. Still... the service... it was on-par with 5 star hotels. I do not typically write reviews, but these guys deserve it.
My only advice would be to find how to get there BEFORE going, as the Riads are a maze. Regardless, I cannot speak highly enough about Le Riad Monceau. We will be staying there if we find ourselves in Marrakech again.