Kostis's apartment was in the perfect location for our short stay in Athens. You could walk everywhere. You could not get any closer to the Acropolis museum and the views from the roof deck were amazing.
Kostis was great in preparation for our trip. He answered numerous questions prior to arrival and helped me arrange a surprise visit for my wife from her sister who was visiting as well. Additionally, Kostis picked us up from the airport and took us to the Piraeus port for our ferry at a cost comparable to a taxi without the hassle.