Stayed in Riad Dar Saad for 3 nights January 2012. It was low season and we had the place pretty much to ourselves.
We got excellent service, lovely breakfast served on the roof terrace and we enjoyed a glass of wine in the evening next to the fireplace.
If you go to Marrocco you must stay in a Riad. It's so much more personal and interesting than the ordinary hotel visits.
Dar Saad is situated about a 10 mins walk from the Djamaa El Fna (main square) in Marrakech. A lovely walk through narrow streets or you may choose to walk through the souk on your way there. 5 mins away you have Ben Youssef museum and Photography museum, both very interesting.
You'll get used to this, but very annoying to be pulled and shouted to for every 5 metres you walk. If you stop to look at something in a shop window they more or less carry you inside and then convince you to buy it. You will have to use some serious barganing skills and never ever pay more than max. 40-50% of price first asked. One third is about right. However, always make up your mind what YOU think its worth and then STOP at that price.
If you don't want to buy anything, be polite, say "no thank you" and move on.