It describes that is gets noisey during Edinburgh festival. But I stayed there after the festival and the noise from ten pm onwards makes it impossible to sleep. The noise from weds-sat was constant. Both people staying wore earplugs and you could still hear the noise from the bars and what sounded like groups of people around the bus shelter at 4am on the Saturday there was people on top of the roof screaming for half an hour.
The windows are single glazed, yes they are period but in such a noisey area I don't think that's ok for an air bnb. Yes the price was cheap and if you don't mind staying in what felt like student accomodation you'll be fine. The bed was actually comfortable but everything else felt like it needed a good wash. (Sofas cushions fridge surfaces bathroom)