ABC is a great place to stay in Athens: well located, well-equipped, clean and cosy. But that's already been said...
George is a great guy. That's allready been said as well....Uff...
You'd better follow ALL his advices. For sure it worked for us, on a such a short stay.
Romanians have a phrase: "omul sfinteste locul", i think suits here.
Go to ABC, meet George!