The flat is nice, plain, comfy and very functional with a big and cooling terrace, which is easy accessable from the living room, kitchen and the bedroom.
The location is very central with just 5-10 minutes walk to the Metro to access quickly Monastiraki or Akropolis, the typical tourist center with shopping, sightseeing and restaurants, within 10 -15 minutes in total. I recommend to purchase 5 days metro pass for 8€.
The beach i easy accessible within 30-40 minutes via the Metro.
Local shops or supermarkets are nearby where you can buy breakfast which you can prepare in the kitchen and enjoy on the terrace.