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.
Use online check-in: Most lowcost airlines now offer passengers the possibility to check in online for their flight. In most cases you can check in online only if you have no hold luggage. However, some airlines do have a special bag-drop desk for passengers who wish to check in online and to take hold luggage with them. By checking in online, you will avoid queuing in order to check-in at the airport (and you will probably also save some money).