We stayed in apartment no. 3 (ground floor) and it was brilliant.  After reading the previous bad comments we were concerned, but had no need to be (our bathroom window did not fly open!).  The location is great, just a short walk away from the town.  The apartments are very quiet and modern compared to some greek accomodation, we even had a proper kettle!  The people in Kefalonia are very friendly, we thoroughly enjoyed our holiday.