Our stay at George's apartment was excellent. The location (Imerovigli) is what we hoped for: close enough to walk to Fira (10 minutes), but just far enough away to not be overrun with tourists. The view overlooking the east side of the island provided for beautiful sunrise views, while a short walk across the road to the west (100 m) led to a beautiful view of the caldera (maybe the best of all viewing locations) .
George was very helpful and ensured we were well informed every step of the way. I highly recommend staying at his place.