Pros:
Location - Fantastic. You're 30 seconds away from the sunset castle where ~200 people cram into for the best sunset in Oia. Awesome view of the island to the West and down to Ammoudi bay. Can walk right down the donkey trail from here.
Price - Very reasonable.
Porter - Vassilli, Maria's Bulgarian helper guy met us at the taxi and was very nice and hilarious. Carried all our bags to/from the apartment from the Taxi. We tipped him 10 euros on arrival and 5 on the way out.

Could improve:
Ad - You cannot actually see the sunset from this deck. You can see 90% of it but not the last few minutes, at least when we were there (mid June). The sun sets around the corner.
Communication - We were told that a taxi would pick us up, but not that a Porter would be carrying our stuff to the apartment. We expected to see/meet Maria, who we did not until the next day. This was our first AirBNB so maybe we should have asked and this is normal.
Showers - Low-ish, water pressure, low hot water volume, and no actual enclosures just a handle with a basin underneath.
Wifi - Spotty service, functioning maybe 65% of the time.

Overall we would stay here again if we could not find a similar place/location/price with a full shower (which admittedly would be hard).