We stayed for 3 days over the Christmas break. Upon entering the flat, we saw a cozy, tidy place. The hosts left a packet with some directions (turning on hot water, tv, etc.) , as well as some travel booklets. Towels were provided and the kitchen, bathroom, rooms had everything necessary to provide you a comfortable stay. Wifi was fast!
The location was great for our trip, it's by Haymarket train station which means lots of buses are in the area taking us into city center or Leith. Uber to city center was also cheap, about 4-5 pounds total.
It was also great that Rachel sent us the keys all the way to the US ahead of time so that we would have no problems checking in. She also allowed us to check out later in the day since our flight was at night.
Would definitely recommend Rachel's place to future travelers in Edinburgh.