We had a fantastic stay Xenia and Valerians place. It’s in a fantastic location within walking distance from all of the top sights. Only 10 mins from the Acropolis and other top spots. They were very quick with communication and they were super helpful with tips when we arrived. And when we needed to call the airport for lost items.
The apartment area has lots of local restaurants and bars so you don’t have to eat in tourist only spots. We went with a friend from Athens to Fabrica tou Efrosinou which was amazing, just around the corner! Other tips, visit the central market and have lunch inside at one of the cafes and watch a film at one of the open air cinemas. Cine dexamini was beautiful. Also, book your tickets for all of the sites online as it saves queuing.