We received a very warm welcome at the apartment, even though we arrived quite late in the evening. Our host had even put some ice cream, beer and lemonade in the fridge, so we could immediately sit down on the roof terrace and enjoy the amazing view at the Acropolis at night.
The apartment's location is perfect for a city trip to Athens, we spent five days in the city and didn't even need to use public transport (except for a trip to the port) because we could walk everywhere. They even provide two bicycles with the apartment (although we didn't use them).
The kitchen is very small (two hotplates and a small oven) but very well-equipped (pots, pans, coffee machine, sandwich maker), including basic cooking ingredients (pepper, salt, sugar, olive oil,...). The bed is a (pull-out) sofa bed, so it's not extremely comfortable but definitely good enough. There's a second one available in a shed on the roof terrace.
Check-in and Check-out were both extremely uncomplicated, I can definitely recommend Dimitris' place!