A clean apartment located within a safe and quiet neighbourhood, I feel that Eleni's place is suitable for couples or even families with young children (there was even a baby cot).
As we went in winter, I liked that place had sufficient heating especially for someone who was not too familiar with cold temperatures.
Some things I had issues with - Kitchen was filled with ingredients that were mostly expired (which I feel is in the responsibility of the guest to check). When we arrived there were damp laundry (bedsheets and towels) still being hanged in the apartment which made it difficult for us to get started on our own laundry.
In all, I still find Eleni's place to be a good place of stay if you are spending time in Athens due to it's location.