Fantastic, bustling location! Easy to get to from the train station and close to a lot of restaurants, pubs, and all the must-sees in Edinburgh. The Airbnb was also well-stocked with water bottles and snacks, which was very much appreciated.
One thing to note is that the flip-side of it being in a fantastic, bustling location is that the nightlife gets really loud and stays that way until late (about 12:30am/1am). I like a lot of background noise when I'm sleeping (even pub-goers shouting at the top of their lungs is fine by me!), so I had no problems with it and slept well, but someone who needs a lot of dark and quiet for sleeping might struggle without earplugs.