Let's start with the bad things first. We didn't know the toilet couldn't handle toilet paper. This gave a lot of issues for us. I wish Fanis would have informed us about it or put a sign up that said not to drop paper in the toilet. He did help by sending a cleaning lady up to pump the toilet, however his responses were quite slow, and since the lady lived just downstairs I wish I had known that from the start, so we could just knock.
It was also quite cold in the apartment even with AC, I've since learned that seems to be a general thing in Greece.
The WiFi connection also left a lot to be desired, it was a pretty flimsy 1 Mbit connection. Again seems to be a pretty general thing in Greece.
We also didn't get any really clear instructions on where we could drop our garbage, but the cleaning was nice to point us in the right direction.
On the good things there is a great location on this apartment, it's right in the center and walking distance to the Acropolis for example. The apartment also looked nice, clean and modern. A nice bed and nice couch. Nice terrace to relax on. Fanis mentioned there could be noise, but we didn't notice any noise during our 10 day stay. Netflix on the TV also worked well despite the Internet connection. Both Fanis and the cleaning lady downstairs were friendly.