We were a four generations on a family vacation. Our daughter's family (husband, 4 year old) and my father-in-law came to Edinburgh for the Tattoo and to see the city. My father-in-law can walk short distances, but we used a portable wheel chair for distances. The unit has three bedrooms and a single bathroom with a tub equipped with a handheld shower.
There was plent of hot water and good water pressure. We cooked more than most visitors might, but we had plenty of pots, pans, cups, etc. AND we made frequent use of the dishwasher. The unit is on an upper floor and there is lift/elevator with flat access to the building. The unit faces south/southeast and has a FANTASTIC view as well as ventilation.
Internet access was adequate and there were satellite TV channels available. We didn't spend all that much time in the unit, or at any of the bakeries, convenience stores that were just around the corner. There is an Asda within an easy walk.
The unit is nicely located to many bus routes and there is convenient parking/pickup spaces for taxi / car services. Additionally, there is a shopping mall over by the Ocean Terminal that is a very easy walk from the building's entrance. We did not have a car, so I cannot say anything about parking, but there is a garage on the ground floor.
I would check here first when we next return to Edinburgh for accommodations.