Orestis's place was amazing! It's super cute and clean - has everything you need! It doesn't have a full kitchen but there are loads of cafes and you're only 10 minutes walk to the center so we hardly used the kitchen anyways. There is a cute courtyard is you feel like having your coffee outside. I didn't meet Orestis personally but he's great with communication. We were late for our checkin and still there was no issue.
This place is perfect for a short stay in Athens either for single person or couples!