Andalla Spa was fantastic, it's bang in the middle of the old town, out of the gate, turn left and left and you're at the start of the souk and only minutes away from the main square.
Christophe could not have been better for communication, he arranged a pick up from the airport for us and even though we ended up 90 minutes late due to airline delays the driver was there.
The building itself is a fantastic example of a traditional riad, it has been thoughtfully furnished and our room was excellent, enough space, hanging space and a super king bed. The bathroom was very spacious with twin sinks and a huge walk in shower with a good hot water supply. The aircon was extremely efficient when needed.
My partner made use of the full 90 minute spa and hammam treatment that was available and said it was outstanding, the best she has had.
One of the other things that made Andalla Spa stand out from nearly everywhere else we have stayed is the staff. They were genuinely helpful and friendly, nothing was too much trouble and they made us feel welcome and at home. We've stayed in enough hotels to recognise outstanding service and people and you definitely get that here.
One final note slightly off topic - if you're thinking of coming to Marrakech and are maybe slightly worried about security and safety - in our experience we felt safer in Marrakech and Andalla Spa than other cities we've visited.