This is an amazing apartment because of the location - literally right across from the Castle. It lights up at night and is a lovely sight from the living room. Plus it is so close to a lot of amazing restaurants and shops, a 5-10 minute walk to the royal mile. It is a tiny bit snug for four people, but very manageable and cozy once you get accustomed.
We had to change our reservation twice - once for the date and once for the number of travelers - and Aileen was so patient and understanding with us. That alone was worth five stars.