This is a hidden gem in a great spot in Athens. Off the beaten track, and certainly off the tourist track - super modern space, great amenities, super comfortable bed and a marvelous rainfall shower.
The neighborhood looks a bit dicey at first glance, but it turns out to be great, and much of Athens looks dicey at first - I think it's the ubiquitous graffiti - but I never had a single problem. Great restaurants nearby - and the Underdog coffee shop is incredible - it was my go-to every morning.
You can walk to the Acropolis from here, and do NOT miss the Acropolis Museum - a modern space and stunning collections. One of my favorite museums anywhere.
A number of restaurants up Irakleidon street have views of the Acropolis - there's one with a rooftop around the corner on Akamantos where it meets Irakleidon that's amazing - best meal I had in Greece.
One other spot that deserves a mention is the Museum Herakleidon - right in the neighborhood - focused on art and ancient technology - it has two buildings about 150m apart. Beautiful.