We enjoyed our two nights at Vivi's place and were pleasantly surprised with the location! The place is only 2-3 minutes walk from the beach and Kamari's main street. Santorini Brewing Co and Canava Roussos are only a 3 minute drive (or 15-20 minute walk, which I did) and I highly recommend both.
Vivi was also kind enough to arrange a airport transfer for a 6AM flight (20 EURO), which is the standard price for all transfers/cabs. She was responsive and a wonderful host. Would stay again.
LOCATION:
Since the listing is a bit vague and we had trouble finding it, the place is located directly across the street from the Aegean Plaza.