Simone's place is a great base to explore Edinburgh (and beyond through bus or train). It's very easy to walk to his place from the station. There's a gentle slope when you walk back to the station, but it's nothing compared to the rest of the city.
There's also a lift in the flat, making it easy if you carry a luggage.
The room is also fairly big with a great view! You'll get to see one of the monuments on top of the hill through the window. We definitely enjoy our stay there - and would recommend it to anyone.