We come to the Edinburgh Fringe Festival every year and this is the best place we've ever stayed at. Handy for either side of the castle without having to go over it (my wife and I are not getting any younger).
Close to everything else we needed too, like supermarket and restaurants.
And the fact the lounge/bedroom is separated from the kitchen/diner area by a door means so much more when you want to get up early for an espresso.