We just returned from a 4-night stay at Dar Al Kounouz and it was a wonderful experience all-around. As others mentioned, the riad is down a side alley off a main street that feeds directly into the main square of Marrakech, but we were met at the airport and escorted directly there without any problems. The interior of the riad is exquisite! The tiling, furnishings and elaborate carved wood and plaster are simply lovely. The roof terrace is clean, lovely at sunset, and smells heavenly of orange blossoms as it abuts the king's palace and his orange grove (I sneaked a peak over the wall). We stayed in two rooms: lapiz and safran. Both are furnished with lovely details and are clean and quiet. I would say lapiz is a little nicer because it has a bathtub and is on the second floor, but both were quite nice.
The best thing about Dar al Kounouz is the staff. Adil and Mohamed are absolutely professional, caring, and did everything to make us comfortable. We came with our 10-month old baby and they made sure to set-up a crib in our room for him and even loaned us their nephew's stroller for our stay! They also arranged a visit to a hammam, our bus tickets to Essaouira, a delicious evening meal at the riad and our taxi back to the airport. I can't say enough about these two! They were always offering us tea, asking us if we needed anything, and made our stay so comfortable and nice. Stay here! You won't regret it.