Even before arrived Chris has been very helpful by changing his plans to welcome us.

There are no wardrobe so better not to come with tons of clothes.
We thought the hot water could have been a problem, but with the four us it was absolutely fine, so not to worry on that side.
Most of all the flat is really close to the Acropolis; don't worry about tickets for buses, tubes etc as everything is at walking distance !
We also went to Sounion to visit the Poseidon temple; at the ground floor there's a KOSMO office where you can rent a 4 seat car for 40€ and drive the 70 km to go there along the west side coast (through Glyfada and Voula); it's just gorgeous !

Altogether a nice flat and a great host ; )