The apartment was amazing! Exactly as advertised. Bedroom was spacious and location couldn't have been better; we were literally steps from some of the best restaurants and bars in town! The Grassmarket was a little bit quieter than some of the other apartments and hotels we looked at before booking this one, and we couldn't have been happier with our choice. We also took advantage of our proximity to the Castle and make the 10 minute walk - straight up stairs - to the top of the Royal Mile. Also, the apartment is literally in front of a bus stop that includes the super-touristy a hop-on-hop-off bus route, which we took advantage of to get acquainted with the city.
Otherwise, everything was clean and well appointed. So glad we chose this apartment, and will make the same choice next time we're in Edinburgh!