I was 6 days in Athen and I have Kal not met.
Nevertheless, he was very helpful and very hospitable during my stay-he inquired always via SMS after me and gave me good insider tips.
The apartment is well located and easy to get anywhere fast. And it is clean and you have everything you need.
Athens is a wonderful, vibrant city, you should definitely visit! and with kals tips-for good tavernas, urban areas and beautiful places there-is even better.