Exactly as stated, quiet and close to the water. Many shops and restaurants / pubs nearby, a market literally across the street, it's a very nice area. Easy bus access to city center (15 minutes) or about 45 to 60 minutes on foot. We walked to Arthur's Seat, up and back.
The apartment had plenty of room for the three of us, two separate bedrooms, living room with dining area, kitchen with all the necessities to prepare meals, and roomy shower in the bathroom.
Craig was very responsive to messages and although we didn't meet, he answered any questions we had.
We wouldn't hesitate to stay again the next time we are in Edinburgh.