Sevi and her husband made us feel unbelievably welcome! They went completely out of their way to help us out and I would recommend this apartment to anyone visiting Edinburgh.
As previous comments state, the room is exactly as advertised - a comfortable double bedroom with en-suite, wardrobe, TV and glorious fish tank! :) You have access to the fully equipped kitchen and a lovely continental breakfast on offer in the morning (cereal, toast, preserves, tea/coffee/juice etc).
The apartment itself is in within a beautiful Georgian townhouse, 5/10 minutes walk from Haymarket (depending on walking speed). You can also walk to central Princess Street in less than 30 minutes(again speed dependant). The neighbourhood is quiet and there is a small Tesco 5 minutes walk away if you forget anything.
If you are considering this as an option for staying in Edinburgh, don't consider anymore and get it booked asap! :)