Foteini is great. The apartment was everything that the listing says it is. We ended up arriving a day earlier than scheduled and she accommodated us with no issues. She was there in person to greet us with treats from her dad's bakery in hand. She'd gotten us drinking water (since the tap is salty). And she gets you a discount if you eat at Prego, one of the best restaurants in town!
Nothing went wrong in the apartment while we were there. Everything was working when we arrived. The wifi is painfully slow, but it seems to be a common issue on the island as a whole. I don't think there's anything she could do about it -- most of the restaurants around run at speeds of 1 mbps for reference).
We sent her messages several times throughout the two weeks we stayed there and she Foteini was always responsive and helpful. I would definitely stay again.
This has nothing to do with the apartment or Foteini -- but if you are from the US, get an international drivers permit before leaving the states or the scooter shops will not allow you to rent a scooter. While there's plenty of shops, restaurants, and rock climbing within walking distance of the apartment, not having wheels did limit us on our trip.