Trystan and his brother run this place. We were welcomed by Trystan: an energetic, positive guy with a lot of enthusiasm. He took the time to explain us the basics of the city and answer all our questions.
The room is located on a very nice spot, centrally and close to the grassmarket, the royal mile and other sweetspots of the city of Edinburgh. It's above a bar, but we never heard any sounds except for the weekend. You will be out and about the city yourselves, so that shouldn't bother anyone. And if it does, don't worry: it closes 1am. Early enough if you ask me.
The room itself was nice and private enough. We heard some snoring from the other room the first night, but nothing to lose sleep over :) However, for a tall guy (190cm) the bed was a bit short.
You share a kitchen and bathroom/toilet with other people, but we never encountered people in the kitchen and the bathroom/toilet was never awkwardly occupied.
All in all we do recommend this place to the "younger" people (on a budget) who want to visit the amazing city of Edinburgh.
We enjoyed our stay!