Our two-storey flat is located right by O'Briens' Sandwich Bar and Blackwell's bookstore, and is barely five minutes away from the university (not to mention very near Princes Street and other amenities like the Pleasance gym). It has a kitchen, four bedrooms and two bathrooms, as well as a good security system, rapid Internet access and an electric shower.
The room available is bright and comfortable, and fully furnished with a double bed. Price-wise, it's definitely a steal (285 per month). Please leave a comment if you're interested and I'll be happy to give you more details.