hotel is a bit old, but everything is still fine, and I think some rooms are newly renovated, coz I stayed here for a few bookings, they gave me different room type each time, some with balcony, some not.
breakfast is good, you can try some greek food there, rooftop bar for night time Acropolis view is recommended, and for tourists like us going islands hopping, you can keep your luggage in the hotel for a few days or just a few hrs before you go to the airport.
location: close to Monastiraki station, many souvenir shops around, and a supermarket opposite to the hotel, if you are interested in the Athens Central Market, you can just walk the other way for like 5 mins and you will see it, also there is a cute restaurant called Little Kook near the hotel, haven't tried, but good for taking photo anyway.