This is a WONDERFUL location to be in Old Town. You can see the castle from the living room window and the walk to the castle is short and scenic. Victoria Street is very close. We appreciated the washing machine to use. Kitchen is large although we did not utilize it.
Check in was smooth although you are required to get a key from a lock box on the ground and if you aren't mobile enough to bend down (or aren't with someone who is) to use the lockbox this could be an issue...for us it was just fine.
Overall, I would rebook here in a heartbeat during our next stay in Edinburgh!
(Check out the Edinburgh Farmer's Market on Sunday mornings just around the corner. So fun!)