We enjoyed our stay in the Nomikos Mansion very much. It consists of two adjacent one-bedroom units -- each with a bedroom, large bathroom, and dining room. There is also a sink and mini-frig in each unit. It's certainly no "mansion", but it did have a large balcony with sea view, plunge pools, daily maid service and food for a Continental breakfast.
Karterados village is not particularly pretty, but it is quiet, and is only a 20 minute walk to Fira, the largest town It is also a relatively short bus, car, ATV or scooter ride to the larger beaches.