Ergon house was a great experience, we only spent the one night. The hotel is located above a deli and food hall which does great Greek food.
Staff are very friendly and good service. The room is nicely decorated with good amenities, mini bar was really well priced too. Bed was comfortable.
The breakfast is one of the stars of the hotel, it is an A La Carte menu and you can order what you want, really tasty and big portions.
The only slight down side was that you can hear people in the corridors in the morning, so as we had a late start we planned to lie in but other people were leaving and going for breakfast from around 7am. It is quiet at night though.
Overall I would recommend the hotel and the location is perfect.