I spend four nights at this property last week. For me the location was convenient, as I had to spend time in Pireaus (€6-8 with Uber). It took about 10 minutes to walk towards downtown for a nice residential area with lots of cafes/restaurants/terraces. Brisk walk to Syntagma Square was 25 minutes. Quite nice in October, perhaps not so nice in August...

For me the sound proofing was enough in the rooms, but YMMV. Buffet breakfast was pretty good. Service was very good throughout.