Stunning property, beautiful decor with the most amazing view over the castle and the rest of Edinburgh. Location is perfect. We travelled wth 6 children, which included a 1yr old, for which they provided a cot. Just a note that you probably won't be able to take the pram up the spiral staircase and there is no lift, which wasn't a problem for us at all, and we just left the pram securely at the bottom of the stairs.
We've stayed in Edinburgh a few times, and this is by far the best property we have stayed in! Highly highly recommended :)