The location is amazing! 5 min from Waverly station, right on the Royal Mile. You can get most places on foot in less than 10 min. DL also has an excellent guide to local attractions, food, and bars. Plus she has a wealth of knowledge. You'd do well to follow her lead!
The room and apartment were spotless and well decorated too--very comfortable and welcoming. She has helpful extras like hairdryers and ear plugs (it faces a street, folks not used to cities might find it noisy but I didn't notice) as well as all the essentials. Bed is comfy and sheets + towels are lovely too.