Re comments above about Christos. We always had lunch on our first day for sentimental reasons, but I am afraid I have to agree with the comments above regarding the service. Consequently we don't bother any more.
I do not like to criticise unduly, especially as in some ways the staff in question can mot respond, but I have found some at Christos to be just plain rude, typified by the disdainful response to my efforts to try some Greek. Elsewhere, taverna staff/owners seem delighted, or at least pleasantly amused by my efforts . Just cut-off mid sentence at Christos. Happy to say that this is the only experience of this nature in Plakias and Greece.