The short version? Just book it now. This is one of the coolest places I've ever stayed in my life.
The long version? First of all, the photos, amazing as they are, still somehow don't do this place justice. The view of Plaka and the Acropolis is something out of a postcard, and since the loft bed is incorporated into the living room, it's your view from the bed as well. In fact, we left the shutters open each night so that that view was the last thing we saw at night and the first thing we saw when waking up. It's worth booking this place for the view alone. However, that's just the beginning. The place itself is beautiful, lots of stone and kind of angular but with lots of modern touches like recessed lighting/speakers, so it seems old and new at the same time. The bed is comfortable and the rainshower is nice, and there are lots of AV extras like a projector screen with tons of free movies available, and easy Bluetooth connection to the AV receiver so you can play your own music through the speakers in the ceiling. Also, it's the only residence in what is otherwise an office building (this apartment itself used to be a jewelry store and the front door is still the huge metal vault door from the old store), so you needn't worry about any neighbors. The location is absolutely perfect, right in the center of a huge pedestrian district between Monastiraki and Syntagma, so you can walk to basically anything you're likely going to want to see in 20 minutes or less (usually less). There is also a small coffee maker with provided coffee pods that actually makes pretty great coffee. Finally, the host who greeted us (Yiannis) was terrific. Lots of clear communication before we arrived, then he met us when we got there and walked us through everything in the apartment, then gave us several helpful recommendations for bars and restaurants. The only caveat I might offer is that given the size and layout of the place, two people is really the max here, it's a place for couples. But with that out of the way, I can recommend this place unreservedly. Just a really unique and amazing space.