I traveled with my family to Athens, we were five people and we had enough space in this flat. There is one proper bedroom and the second one is flexible between a studio or a bedroom with a double sofabed. All very comfortable. The fifth sleeping space can be arranged with George.

The flat is as described, nicely decorated in a contemporary style and well equipped.
The location is great! Very central and part of the lovely neighborhood of Kolonaki, shops, cafes and supermarkets close by.
About 8 mins walk from Syntagma Square, coming from the airport you will be much better off getting off at Syntagma metro station to walk to the flat overall if you have luggage to carry, otherwise Evangelismos is a good 18-20 mins walk (really pleasant though)

George was quick to reply to my queries throughout the process and during our stay in Athens, and although I panicked when I arrived to the airport and I couldn't get through him straight away, he replied within minutes and Pablus was ready at the flat to show us around.

I recommend this flat.