Stayed here with another couple and it was a nice stay. There are plenty of food options close by. Not too much to see around so mostly we went to Edinburgh. When we stayed there wasn't an explanation on the 5 keys for the unit. We needed 4 to get into the flat so there was some trial and error to get inside. The apartment information card in the flat was inaccurate at the time so we had to use the password on the router. There weren't fans that we could find and no air conditioning so heads up if you sleep hot.
If I were staying in Leith again I would consider staying again but would see what else is available.