This Riad is superb! The owner is French, and extremely welcoming and attentive.
The Riad was built from scratch a few years ago, and is simply stunning inside - lovely air conditioned rooms, tasteful decor everywhere, and great public areas.
It is located quite near to the main square and is quite easy to get to.
The service that we had was fantastic - Said on hand to get us whatever we needed (Although I did feel that the poor guy could have done with some help - there was a group of us staying, and he was constantly running up and down stairs to try and get all the drinks etc that we wanted )
My only complaint - more to do with the downside of Marrakech than the Riad, but it is down some pretty quiet streets, and there are often several young men who hang around the nearby car park, who will follow you to the door under the guise of giving you directions (Even if you know the way) and will then aggressively demand money from you when you get there. The owner tried to clear these guys out on more than one occasion, but they are very persistent and never go away.
Overall though, as I said, the Riad can't be faulted from what we saw of it. Did not use the Spa ourselves, but some members of the group did, and highly recommended it.