We are great friends with a cypriot couple and their kids the only thing they said was that last year and again this year it's blistering hot. Last year was 40°C + and even with airco it was uncomfortable.
They sleep from 12-4 and stay up late they said to us if we went with our son we'd pretty much have to live like that and it's hard to get your kids used to that lifestyle for only a week.
I'm still dying to go with them though as their parents came over and they are the friendliest most sharing people I've met. Only annoyance is fighting to see who pays everytime we go out. (because we both want to do it and if we let em they'd pay everytime. )