Don't stay anywhere else in Athens!!! Ileana's apartment is just marvelous. Spend the day in Athens or elsewhere and come back home to relax while having a glass of wine on the gorgeous patio, which overlooks the acropolis.
The apartment was very clean, and check in was a breeze. The location is absolutely unbeatable - it's very quiet but only about a 15 minute walk to the square. There are plenty of shops, cafes, and restaurants nearby, and it's very close to the main attractions and well as public transportation.
Ileana's mother, Olga, was wonderful, too. She was quick to respond to our questions and messages, and she even made dinner for us one evening! We would highly recommend staying at Ileana's flat - you can't beat it!