As other reviewers have said, this is a lovely apartment with amazing views and in a location 'to die for' - one street down from the Royal Mile, close to the main tourist attractions and the University and with dozens of fantastic eating venues all around. I believe others commented on the check in process and hopefully this can be improved in future.
The bedrooms are approximately equal in size with equally nice en-suites (one has a bath) and plenty of linen. We found the flat ideal for two friends (attending university which meant we used the dining table as a desk and it worked really well).
The company that manages the Air BnB was fantastically responsive and helpful.