We spent 3 weeks with our 8 month old twins at Katerina's place, and it was excellent. The location is great with plenty of amenities nearby, and the metro is so close that getting around Athens takes no time at all. If you want to walk to the sights, in less than 30 minutes you can be almost anywhere in the central area, even pushing a stroller (which fits in the elevator by the way). You won't regret staying here!