10 out of 10 for location, the apartment is a short walk from the train station and is surrounded by great bars, coffee shops and restaurants.
We didn't actually meet Simon but he kept good contact which suited us, the apartment is cosy with all of the basic needs and was good for what we wanted. The only down points are that the outside entrance is a bit scruffy (bags of stuff, old carpet etc) which isn't very welcoming, and a strong smell of damp when entering. A bit of tlc is needed, otherwise a good place for a short stay in beautiful Edinburgh