D&Y Boutique is a very nice and original place to stay in Athens. It's really a special stay due to how stylefully and originally it is decorated. It has a kitchen equipped with everything you need to cook a nice stove-top meal. A comfortable and clean bathroom and a very comfortable bed and couch.
It is close to many nice bars and restaurants and some touristic hotspots. Also you can reach there easily by metro.
The one downside is the streets directly around the AirBnB. It is not unlikely to run into drug addicts doing heroin in the middle of the day. Of course this could have been just our own bad luck, yet I wouldn't recommend it as a place to stay with kids.