I had a great stay at Konstantinos' apartment.
It is a studio apartment, but perfect for a solo traveller or a couple, and the photos depict the space quite well. It is fully equipped (even with a washing machine), very clean on arrival and with plenty of natural light — which for me is a priority.
Konstantinos is a great host. I did not have the chance to meet him, but he was incredibly responsive and helpful to my messages. The check-in process was simple and easy, through a locker box, and he was kind enough to allow the checkout a little bit later.
In regards to location, it is very central and convenient.
Ευχαριστώ πολύ Konstantinos!