Giota's apartment is excellent! Stylish furnishings and nice kitchen equipment, clean space, good air conditioning, nice quality amenities. The blinds are so good that you can make the apartment really completely dark while you're sleeping. The building also is very secure, and we really enjoyed the rooftop pool. The only thing to be aware of is that it is on quite a steep hill, and some of the streets up are actually staircases. It's fine if your group is young and energetic, but I would be more cautious about bringing older relatives or someone with mobility difficulties to this apartment unless I was going to be able to drive them. But that's just something to be aware of -- it's a great apartment!
And if you are in condition to climb the hill, you can continue up from this apartment to the very top and enjoy a nice drink up there with a terrific view of Athens. Recommended!