The Castle Nest is quite possibly the best location in Edinburgh. A stone's throw from the castle, camera obscura, pubs and restaurants and only a short walk from the likes of Greyfriars kirkyard, the national museum and tour meeting points.
The flat was spotless, comfortable, fantastic location and the decor was fantastic (even if you're not a HP fan!)
John was extremely helpful and informative, and made some great food recommendations which were greatly appreciated.