Any point in half hour lessons?
There's no point in
booking any half hour lessons - you'll spend fifteen minutes taxiing and fifteen minutes trying to get back to where you were last lesson, and ... er that's it.
But you certainly learn something from the lessons that end up being abandoned unexpectedly after half an hour, whether from weather or the aeroplane breaking. (Or simply the student changing their mind and realising that they really
should have gone to the loo before the lesson - it's not happened to me, but it must have happened to somebody!)