The Apartment is great! I stayed there with my husband and toddler for 3 nights. We really enjoyed the location as it's so wasy to walk to Princess Street etc. We also went up Carlton Hill wich was lovely.
I also thought that the apartment was very clean and the towels / sheets smeeled lovely. We went last weekend when the weather was lovely. As the flat is on the third floor and the sun shines on it most day, it was rather warm inside. It didn't bother us too much though and probably isn't a problem for most of the year anyway.
Communication in advance and during the stay was brilliant.
Would definitely recommend and use again if we need somewhere to stay in Edinburgh.