Ilias' apartment is a charming and delightful place to stay, but some of the fundamentals let it down and detract from the overall experience.
On the one hand, the decor and feel of the place is a real delight, and a fantastic change of pace from the typical sterility of a hotel or condo. The neighborhood is almost just as charming, a quick walk to all the central sights and shops but with its own identity, shopping, and nightlife. Ilias himself is very kind, thoughtful, and most of all accommodating and committed to his guests.
Unfortunately charm alone doesn't make for an ideal stay, however. The beds are rock solid, even the sofa bed in the living room is more comfortable. Athens can be a noisy city sure, but both bedrooms are on the street with only single glazing and some thin curtains that do little to block the morning sound and light. The toilet is fussy (especially when you're half asleep) and the shower could really use some simple quality of life improvements like a holder for the wand.
Ultimately we had a perfectly decent stay at Ilias' apartment, and he's charging a very fair rate for everything you get.