Really great place to explore all of Edinburgh! We stayed for 5 nights and easily could have stayed longer! Pros:
1) bed is super comfy! We slept great and it is a little larger than many of the euro style double beds.
2) kitchen is well equipped and stocked with all you need to cook! Spices, oil, coffee, tea, sugar, and Valentina was so sweet to leave cereals, milk, jams, shortbread cookies, water!
3) tv and living room nice to relax after a long day at the festival!
4) walking distance to everything near the castle and fringe fest activities
5) wash machine and drying rack were great for a long stay!
Cons:
1) shower a little slow to drain on high - but was great and hot!
2) stairs up and down may be difficult for some, however, easy and wide for 3 flights of stairs
3) some noise can be heard from the construction site across starting around 8am - but not so much if you shut up all windows.
Would return for sure!