Two things make this a top-shelf location: First, well, location! You're a short walk from Waverly train station, and you can be sitting at JK Rowling's favorite writing table at the Elephant House, walking up to Edinburgh Castle or shopping on Prince's Street within minutes of shutting your door. There's also a great pub (the Jolly Judge) literally just outside the back door.
Second: Patrick! This is a very sweet, laid-back gentleman who never has an unkind word to say. If you're lucky enough to partake in conversation with him and his equally delightful partner, Chi, your BnB may just start to feel like a second home.
After a somewhat impersonal experience in Prague, it was great to feel so heartily welcomed in Scotland. I recommend this rental unreservedly.