Kostas was extremly helpful and welcoming. He was the perfect host. And it was really easy to communicate with him.
I staied at Kostas' apartment with my parents. It was our first time in Santorini. The location of the apartment cannot be better: 20seconds far from the beach. The beach is an awesome dark sand beach. In front of the beach there are some restaurants and bars.
The apartment has everything you need, including two new AC systems. The terrace of the apartment is lovely, great for sitting during the evening.
I would certainly recommend this apartment to anyone visiting Santorini.