The apartment, although meant for one person or a couple, is quite spacious and cozy, very clean as well and, most importantly, it was the same as shown in the pictures.
I traveled to edinburgh on my own and as a female solo traveler I found the place and the area around it safe. It is located a but far away from the central area, 30 minutes walk but, as I like walking, it was no problem for me.
I recommend it!