Nice, little apartment. Clean and well maintained. Jenny and Steve were very friendly and responsive hosts and do their best to keep you informed and make your stay as pleasant as possible.
We visited for a few days for the Fringe festival and location is a good 15-20 minute walk from the old town and considering Edinburgh is very hilly, you need to be prepared for that but there are other ways to travel if you don't fancy walking and the street the apartment is on was nice and quiet.
My first experience of using Air BnB but it was very good. Recommended!