This isn't really a hostel - its student accomodation that is rented out in the holiday period. So - you get a private bedroom (single bed, really rather comfy), but you share toilet/shower/kitchen facilities.
I've stayed here a couple of times when i want to be in central edinburgh for an early departure, and its fine. Not flash, not the best value ever, but the beds are comfy, you get clean sheets and a towel, and there is even secure cycle storage - not sure if you can park your car there, tho there is a carpark.
One thing you should be aware of - the stairs! Lots of them, and no lifts. So if you've got lots of luggage, or an injury/disability that limits your stair climbing ability, this place is not for you. That said, if that's the case then maybe edinburgh isn't for you!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC