We stayed 4 people at Konstantinos parent's place at Kea In July 2015. We all had a wonderful experience staying at their place. Maria and Kostas are wonderful hosts and Konstantinos was always quick at answering whatever questions we would have regarding our stay. The house was beautiful located and is a good place for a family or close friends. We rented their car for 4 days, which was necessary to get around the island.
Among other places we went to see the archeological remains of the ancient city Karthaia. We recommend others to do the same although the way to the city is an hour away on foot from the main road.
All in all, we would highly recommend this place :)