My two roommates and I stayed in Jessica's flat for three months and it was absolutely perfect! The bedrooms are both very comfortable (one shares a street with a school which can be a little noisy). The kitchen is very spacious, good for cooking in groups. The sofa bed shares a room with the kitchen which is something to make note of, but was never an issue for us. Ola is incredibly helpful with any issues you may come across and will also offer to clean the flat if you are there for an extended period.
City center is just about a 10 minute bus ride or a 15-20 minute walk. Overall a great home for us while studying in Edinburgh!