Helen and Konstantinos are great hosts, very helpful and clearly communicating, and providing you with great local tips during your stay.
Their place is comfortable (and remains at a good temperature even during the ongoing heatwave!), with a fully equipped kitchen, well thought living room, large bedroom and nice amenities for the bathroom.
One small warning is for light sleepers: the flat is nearby a railway track, and trains run early until late, with their sound audible also when windows and doors are closed.