This gem of a hotel is in a wonderful location for sightseeing. Historic with an industrial feel (that's why we chose it) we opted for a rooftop terrace room which was extremely comfortable and spacious enough for our 5 night stay.
Reading previous reviews I knew there were no storage drawers (which would be beneficial) but we asked for additional hangers in advance to rectify this issue.
All the staff were welcoming, friendly & professional. The big portioned breakfasts were delicious and the option of dining on the rooftop for fabulous views, or inside under the vaulted ceiling on ground floor was perfect.
Only minor 'downside' for us was that the pool was absolutely freezing. I know European hotels do not heat their pools, but as it was inside it did not have the heat of the sun to warm it slightly, as a result I had to bail within 5 minutes, which I felt was a shame, but this personal preference would not stop me visiting again or recommending the Asomaton.
I would sum it up as a 'wonderful quirky hotel with first class service at a reasonable price' perfect for your Athens adventure!