I have just returned from a 2 week holiday in Kardamena staying at the Mamouzelos apartments. Leftis the owner is a very nice man who is always around to answer any queiries you may have.
The apartments are very basic but have a shower Curtain (Which is apparantley a luxury in Greece!) the apartments are cleaned twice a week with clean towels and bed linen provided.
I would strongly recommend these apartments to anybody who is looking for a basic self catering holiday, plus the main square is only a five minute walk from the apartments.