Softy southerner calling,
Missiria Studios/Apartments, Rethymnon, Crete through Kosmar. Yes, it has air conditioning & looks reasonably priced. Not too far from busy Rethymnon. The people of Crete LOVE British people, this stems back to World War 2. It is something when you go to get a pint of milk of a morning and have a glass of Raki(firewater) presented to you as you pay and the person stands and watches you drink it !!!! Take the kids with you as they will be given sweets.
Marios Studios/Apartments, Laganas, Zante/Zakynthos, Kosmar. Air conditioning. 5 mins from centre & 6 mins to Beach. Zante folk are friendly, we stayed on this island in May but we go in for the quieter life. Couldn't help but fall in love with the place. Good luck in your quest.