This is probably the best AirBnB I have ever visited. I cannot recommend it too highly.
1. Very clean. Spotless.
2. Photos very accurate -- I think it is even better than the photos show.
3. Completely quiet (my wife is light sleeper.)
4. Safe -- heavy deadbolt door.
5. 7-8 minutes leisurely walk (downhill) from Syntagma Square/ X95 bus stop from airport. Also Syntagma Square metro stop.
6. 5 minutes walk to Monistaraki Square.
7. Comfortable for 3 people (me and wife, and family friend in other room); beds are excellent. Air conditioning works perfectly. Reliable wifi, hot water, microwave, hot-water pot, refrigerator, shower.
8. Excellent value for money.
Xenophon also was kind enough to meet us at X95 bus stop when we arrived --we were tired and bewildered. (It is an easy walk to/from apartment, but the first time is a bit difficult, as street signs are often missing from the corners of buildings.)
I can't wait to come back.