This appartment was fantastic! It was huge, clean and very well maintained. It's located at Plaka so you're literarily in the middle of the old city center with plenty of bars and restaurants. Very lively!
The host was very prompt and correct. We only met very briefly upon departure but he's very friendly.
I stayed here for work with my colleague, and I could highly recommend this appartment to anyone. I'd definitely stay there again when I'm in Athens next.