Charlotte's apartment is is Edinburgh's West End, very close to plenty of shops, restaurants, etc. Very safe neighborhood - we never felt uncomfortable even late at night. Just a few blocks from Shandwick Place which becomes Princes Street, the "Royal Mile", through the heart of Edinburgh. All is easily walkable. Charlotte provides very specific and accurate directions to her flat, follow them and you'll have no problem. All in all, a perfect spot for us.
Marc