We rented this studio for a week, located in the heart of Athens, which is close to a lot of historical sites (Acropolis, agora, museums...). Although we didn't meet Kostas, he was a very nice host, responding fast to our questions and giving us tips about some nice places to eat around Monastiraki. The apartment is very well equipped with everything you need even with air conditioner.
The building feels a little but old, but enjoying traditional Greek food on the rooftop with a direct view on a well lit Acropolis at night is priceless !