David and Amy's place is perfectly located for the Royal Mile and pretty much anything else in central Edinburgh. It's larger than we expected, clean, recently refurbished and has a lovely view from the kitchen counter out over a period courtyard.
Despite being just off the Royal Mile it is surprisingly quiet - although it has original sash windows so not completely silent. If you're a particularly light sleeper, earplugs are probably a good idea.
On the downside, we didn't actually meet David and Amy but instead dealt with a management team, so if you like the personal touch of Airbnb, this may not be the best place. On the other hand, everything was dealt with efficiently.
We had a great stay and the place is decent value (for Edinburgh) in a perfect location.