Four of us stayed for 3 days in December - 2 kids 6 and 4 years old. Got the train from the Airport on the direct line to Monistraki station and had an easy 5 minute walk to the hotel. Tip: don't get return tickets as we did because the trains were on strike on the day of our return and striking is currently a recurring problem in Greece. Hotel arranged taxi to airport for €40 - hassle free.
Warm welcome at reception - very child friendly and were happy with adjoining rooms with complimentary small bottles of wine. Rooms not very large but as we were out exploring most of the time (or sleeping), this did not matter. Bathroom small but shower and amenities fine.
Roof top terrace was open but not the bar (never mind - we took up a drink and savoured the wonderful views).
Great location for wandering around Plaka, Acropolis and Syntagma (Parliament and the National Gardens). All within 10 -15 minute walk and that was with youngsters in tow.
Plenty of restaurants around and although it wasn't a particularly busy time for tourists, we didn't get hassled by waiters to eat in their establishments. Found everyone very friendly both at the hotel and out and about. Would recommend Thanasis for cheap kebabs and quick service and Scholarchio Yerani for excellent value real Greek food.