The location of the hotel is very convenient, being both on the metro line to the airport and to Piraeus port, and very central. View from the room on the square is nice, providing you're there Monday to Thursday. At the weekend, between the African tam-tam and the loud music on the rooftop cacktail bar, it was impossible to sleep (room on 3rd floor on the square) until it stopped, in the middle of the night. The glazing is good enough to provide soundproofing to the noise from the street (cars, buses,etc) but not the loud music and drums. The girl at reception offered me earplugs... Staff is friendly.
It's a shame, because otherwise the rooms are nice, clean, modern, with a nice bathroom (good amenities, and also slippers and dressing gown). For me the bed was way too soft. But I enjoyed being able to make a cup of tea or coffee.
The breakfast room has nice views on the Acropolis and Monastiraki square. Breakfast is delicious, with a large variety of things (local too), and freshly squeezed orange juice available too.