This place deserves a 5/5 just because of its stunning location - it's a stone's throw away from the trails at Land's End, which affords awesome views of the sea and of Golden Gate bridge (when the fog isn't in). You can also access Golden Gate park and the Presidio fairly easily either on foot, bike or public transport. Some folks might feel that it's a little too far out of town but honestly the buses are reliable and cheap.
Harris himself was a great host and communicated exactly what was expected of us as guests. Room was clean and well stocked. We could also use the kitchen if needed. Only complaint I'd have - and this is of no fault of the host - is that there was just 1 bathroom to use amongst all guests. Plan your bathroom trips well. But overall, I'd totally recommend this place.