One great thing about Tong's place is that it is so close to all the main sites that when the heat gets too much for you, you can retreat to the apartment, take a break and go back out again. Staying further away your choice probably be either sweat it out or call it a day.
Tony's place was also modern, clean and bright, with easy access instructions, and some cold drinks in the fridge on arrival. Tong included a list of the sites' opening hours and charges which was very handy.
A perfect pied a terre for a stay in Athens.