Carolines place is well taken care off and was next to impeccable when it came to cleaning, supply of amendities (cereals, jam, milk, coffee, tea and even olive oil for some cooking + a bottle of water, shampoo, etc).
Do be aware that - although earplugs are supplied - you may hear from outside.. especially people returning from their night out. Definitely not a dealbreaker for me, but you are pretty much in the city center with the sounds that come with that.
I would definitely recommend staying here for the weekend getaway to Edinburgh! Caroline is very communicative and although we did not meet, we got all the information required including the "how-to" in accessing the apartement.