I felt very compelled to leave a review after booking this unit thinking it would be perfect, since it definitely is not and other reviewers somehow didn't experience or comment on the issues:
Pros: Location is mere blocks from Acropolis Museum, Metro, touristy dining. The location alone would make it seem great, except...
Cons!:
1) The door is paper thin and the building is an old echo chamber with very loud neighbors that scream in the hall at all hours - kids playing, doors slamming, dogs fighting on their way to be walked, etc. The door has zero weather sealing and is so thin that it sounds like they're in the apartment with you. You won't sleep here. Period.
2) The hot water heater apparently has wiring issues because the breaker will be turned off with instructions that you may only turn it on (30 minutes prior to needing hot water) for your shower as a safety concern. We got in to town wanting to drop off baggage, shower, and get out to see the town only to see that there was a known issue with the heater wiring that necessitated the owner leaving explicit instructions to go in to the breaker panel and manually turn on/off the heater as needed because it was unsafe. Seriously, it specifically says it's unsafe and can't have its breaker on expect when you need to use it. I, personally, am not comfortable messing with breakers - let alone foreign ones - and found this completely unacceptable. Hire an electrician, stop renting the unit, anything other than establishing procedures for getting around whatever is wrong with that water heater and requiring guests to mess with circuit breakers.
3) Speaking of showers, I've traveled the world and stayed everywhere from a hostel in Beijing to a 5 star in Cambodia and never seen a shower that was nothing more than a loose hand held that when in use douses the entire bathroom in water. There's no bath mat (not that it would help) but there is a Janitor's mop cart. When you first arrive this will seem out of place until you wait 30 minutes for hot water and get to finally start up that shower. No attempt at containing the water will work, so just expect the toilet seat, entire floor, etc to be soaked and watch your step or you'll bust your ankle.
4) Generally run down. It's not a terrible flat - especially given the price - but the curtain rod was pulled out of the wall, the mattress feels decades old and gave me back pain that lasted a week after departure, and the aforementioned wiring concerns.
5) Communication. I really thought there was a fluke when I couldn't get a response from Fani after previous reviews raved about how helpful and responsive she was. Alas, I got a quick response to my initial question, booked, and waited a month with no response to my next question on checking in at odd hours (ferries can arrive after midnight from many islands) and whether to metro or taxi. That response finally came once we were already in country on a remote island, once she realized we were arriving soon. This came entirely too late to be of any help to us and we had difficulty getting to internet to even get it since it came so late.