The location of the apartment is excellent, and it helped to making my trip in Athens amazing, as its walking distance from all the main tourist attractions, in a safe block, and next to a street with loads of restaurants.
The apartment is medium size, with one main room, a lounge (with sofa bed, so it fits 4 if needed), a bathroom and a kitchen equiped with all you could need. Perfect shower, hot water with good pressure. It's been cold nights, so had to use the hot air coinditioning, but they worked fine both in the room and the lounge.
The communication with Stella and Nikos was great, the apartment was easy to locate and the check-in was also very easy, all went very smooth.
So basically it was al perfect, nothing bad to say and I would of course recommend staying here.