The amenities was really impressive. AC, Towels, Shampoo & Soap, All kitchen utensils, Warm duvets and blankets, Books on local information for tourism, a balcony to hang wet towels, excellent bathroom.
Great location (Just 2 mins from Kamari beach - Kamari beach is the best beach in Santorini, No contest)
Nice touches were the bottle of water in the fridge and help sorting out taxis.
If I have to be too demanding then I could suggest adding a Hand-Held Hair dryer and a few bathroom mats.