We were new to Athens so taking a bit of "pot luck". The apartment is quiet and private, even though it's at street level. No problems sleeping in.
It has air con, though we were there in October and didn't use it. We'd be happy to recommend it.
The apartment is in a great spot, next to lots of places to eat, but our favourite was left, then left again down the steps and on the left, lovely local place. Or turn right and then right and another just on the right..... lots of choice.
It's an easy walk to the Acropolis and to the Plaka, in fact if you're happy to walk then many of the main sites are close enough.
Do the Cycladic Art museum and go up to the top of Lykavittos Hill too.
The supermarket and baker are close and eat as much baklava as your diet can stand, heaven.