The location is very good, just 400m from Syntagma square. It is very spacious and may fit 8 adults. But it has only 1 bath. The interior and equipment is very outdated. Kitchen is very small and has full of outdated appliances: some are not clean enough to use. This apartment is located at the 2nd floor of the building next to Blue Bird bar: they play loud music until 2AM (Some drunken people were sing and dance on the street until 2AM).
If 1) you are a group of 6-8 adults and 2) don't mind these negatives and 3) just need a place near Plaka , and 4) want to pay a reasonable (comparatively cheap) price for an apartment, then I think that this place is a good choice.