I would second the comments already made about George that he is a wonderful host. Very polite and helpful. He picked us up from the bus station of Imerovigli (though its just 5 mins away, but we weren't really sure about the location when we landed in Santorini).
We loved our stay in his apartment. The doors of the apartment open to wonderful view of the sea and facing the eastern side, its great to enjoy the sunrise from here ( and sunsets from Oia ;) ). The apartment was spotless clean and the bed was really comfortable. AC worked fine. Only the kitchen is a bit short of dishes to cook a meal and if you want to cook anything you would have to start from scratch (from buying salt and pepper and oil to everything). And even sugar for your coffee (which was a bit disappointing). Also the wifi was a bit slow.
The cleaners come to clean the apartment every morning which was a plus so you don't have to spend time doing the dishes and tidying up.
The whole property of George is very lovely and located just 10 mins walking from Imerovigli centre and lots of supermarkets and restaurants nearby.
Good choice for people who want to have a good night's sleep away from the hustle and bustle of tourists and want to enjoy a peaceful breakfast in a sunny patio overlooking the sea.

All in all, worth the money!
Thank you for your hospitality George! If we visit Santorini again, we'd definitely like to stay at your wonderful place :)