Manos was super nice.
I arrived really early in the morning and looked for a place to stay through the mobile app. After booking the apartment, Manos enabled me to stop by and drop my bag in his office because the apartment was still in use. He was very informative and gave me good advices for a two days stay in Athens. The apartment is very well equipped and very spacious and nice. The location is a bit far from the center, but close enough to the metro, and the neighborhood is really non-touristic, safe and nice.
If you have the chance - stay at Manos