We stayed at Naoko's flat for two nights. The location was fantastic and as advertised -- across the street from bars and restaurants, a block or two away from the bustling Grassmarket, and complete with a view of the castle from the front door! Naoko was extremely communicative throughout, shared plenty of great recommendations for restaurants and bars leading up to our stay, and was very thorough in her directions to get into the apartment. Everything was very clean. The bedroom was clean but sparse (only the bed and one night table). The shower was also clean but a little tricky to use. We're American, so it was probably a lack of knowledge on our part, but we couldn't quite figure out how to prevent water from getting onto the floor while we showered. That said, the water was hot, the water pressure was spot on, and there were plenty of towels to clean up with. Overall, it was a very pleasant stay, and I'd recommend Naoko's apartment for travelers who have a few days to spend in Edinburgh and want to be cost effective.