Very comfortable and clean , and a great host. The host has an excellent guide for the flat, great communication, and check in procedures were very smooth. The location is central making it very easy for us to get to all of the locations we wanted to visit in Edinburgh by bus or car (parking on the street was not difficult but did require a walk of 1/2 to 1 mile so some evenings). The bed was comfortable, kitchen fully stocked, and the living room was cozy (our teenager slept on the couch bed comfortably).
We do wish we had been aware that the flat is on the 4th floor and faces a busy street that is a primary lory route. The bed and couch shook/vibrated when buses, lories or vans traveled by which was difficult to sleep through after 5 am. It is also a northwest facing flat, so can get quite hot in summer.
Parking turned out to be much easier than we thought at first. There is ample parking for free after 1730 within two blocks of the flat. During the day, we would drive the car a mile down Broughton, where it was easy to find free parking on the street The bus line 36 runs back to the flat and from there goes straight to the east side of Princes street in the city in about 15 minutes.
There are two stores just steps away for groceries and a wonderful cafe directly across the street that we would suggest for breakfast or lunch if you don't feel like cooking.