We stayed here during a recent trip to Edinburgh. There were three of us and we stayed three nights.
+PROS+
-Unbeatable proximity to all of Edinburgh's most popular sites
-Nicely decorated
-Well-equipped kitchen (big fridge!)
-Safe location
-Great view of Royal Mile
-CONS-
-Bars downstairs mean rowdy patrons shouting late into the night, every night
-Poor noise insulation; When the garbage truck came around in the early morning, it was so loud we actually thought someone was trying to break into the apartment
-Stall shower is INCREDIBLY tiny; Cannot even bend down to wash your feet
-Be prepared to carry your bags up four flights of stairs