Slow flight is important and can be a life-saver, but I agree with the previous comment that it is better covered in small doses on other exercises, rather than as a dedicated sortie, starting with Effects of Controls 2. I remember the great hoopla when the exercise was introduced. In fairness to the powers that be, it was seen as a necessary addition when spinning was discontinued. The problem with doing slow flight in bite-sized chunks, as I do, is ensuring the logbook unambiguously indicates that the required flight time has been undertaken. An annotation in the remarks column is as good as anything but I'm open to suggestions.
Perhaps we should take a leaf from the Americans' book and teach the chandelle?