This apartment is perfectly located for exploring the numerous hip(ster) cafe/bars nearby. The space is beautifully decorated and very-well designed. The amenities are plentiful, I especially enjoyed the tiny balcony!
The only thing that put a damper on a full 5-star review is the amount of noise - the apartment faces the door of the building and people quite noisly come and go through that essentially the whole night. But if you have a good set of earplugs or are simply not bothered by this type of thing, this is definitely a top choice for Athens.
Communication with Spyros was excellent throughout - he's a wonderful and welcoming host!