My flight was delayed by 9 hours and once we set off was ok although the plane did appear to be old worn and shabby inside. The delay was due to a generator failure on the previous flight when the plane had to make an unscheduled landing in Naples. On the flight back from Kos (which we were not on the plane), they had to make another unscheduled landing back in Kos due to a generator problem.
Re-check your flight details: Low-cost airlines may (rarely) decide to change the departure/arrival airport (to another airport in the same city) or to reschedule flights. You are usually informed of these changes in advance, via e-mail. However, it is recommended that you re-check your flight details a couple of days before departure.