The flat is as beautiful as it looks in the listing! There are nice showers and beds throughout. As with many places in the UK, there is no place to hang more than one towel and no place for your shower stuff: I know we Americans are spoiled. The place is quite comfortable and being met at the flat to get a tour and keys is nice. Linda and Tony are very responsive, which made it easy to get questions answered in a timely manner.
Don't rent a car for Edinburgh; parking is at a premium and you really don't need one. Take trains out to other cities and use Central Taxi or buses to get around town.
Try Montpelier's Restaurant for great food anytime and Thai Lemongrass for a wonderful Thai meal. Cafe Artista on the other end of Thirlestane Rd (across from the Sainsbury's) is good for pizza and other truly Italian foods.