This riad is beautiful, calm, and tranquil. It's a great escape to the rush and noise of Marrakech outside. We had a room on the ground floor that was very spacious, comfortable, and well organized. We felt a bit like royalty! The courtyard is so charming with the pool and waterfall and the breakfast served in the morning was plentiful. When we arrived, the assistant manager served us some mint tea and we talked about our plans for the next day (our last in Morocco after 8 days there). He gave us good directions for the few remaining sites we wanted to see and was very nice and helpful.
We had stayed in a different hotel (dar) in Marrakech earlier in our trip which was on the other side of the Jemaa el Fna square and the neighborhoods were quite different. There it was very quiet and residential while around Riad L'Orchidee, you have a real working neighborhood. I actually recommend it for that reason, it's safe and about a 15-20 minute walk to the square which takes you through streets filled with people and everyday shops (i.e. not touristy). It can be a little intimidating but, as I mentioned, we felt very safe. It's also convenient for the Ali Ben Youssef Medersa and Majorelle Garden.
As with many places in Marrakech, it's difficult to find the first time around so use their taxi service or make sure whoever is taking you takes you to the door. Oddly, once you know where it is it's easy to find!
One criticism is that the prices for things in the riad, i.e. a 1.5l bottle of water, are a bit ridiculous. You can buy a 1.5l of water from any small shop for 6DH, I think the riad was charging 2E (about 20DH). However, I understand that they need to make money and the service is great there, especially for such a reasonable price!
In short, we would definitely stay here again.