We booked last minute for the Easter Holiday - once we checked in we were confused as to why the place hadn't been booked. It is a 5 minute walk to Waverley Train Station and you are off the main street (Royal Mile), so there is little to no foot traffic, but you are as central as you can be (5 minute walk to the castle). The building is 10 steps from the middle of the Royal Mile. There is a nice cafe and a neat pub right outside the place too.
Gill provided us very clear directions as to how to find the building and she even left us some chocolates and milk for our tea. We will hopefully be back to Edinburgh soon and will try to stay in this same place as it was everything we needed and more.