Excellent spot right -smack bang!- in the middle of Edinburgh, just an under 10 minutes walk from Castle Rock. Amazing view on the Royal Mile. The place has two comfy bedrooms with very good sturdy queensize mattrasses (160*190 but with the possibility of sticking feet over so no worries for tall people like us). Some of the previous guests must have smoked indoors, there was a faint smell of old tobacco smoke in the whole place, and also the linens. The bedrooms are situated at the rear of the apartment so the noise from the pubs won't keep you from sleeping. The apartment has a good size bathtub and in-tub shower. The kitchen is quite well equipped with a stove and oven. The crockery and cutlery needed a pre-use wash (again, inheritance of previous guests I'm afraid...) and we couldn't get running hot water so we did the dishes using hot water from the kettle, which was fine. Supermarket less than 5 mins walking distance...
All in all, it's a real gem if you want to stay in Old Town with your family or two couples.