I found it very useful, and as Mo says, good to get to know other diabetics around as well
The nutritional sections were a bit noddy for me and had absolutely no recognition that "normal eating" may mean different things to different people. The exercise section was also very basic for me, but not for others.
Some section though were very helpful, such as the sick day rules, and the sections on basal and bolus adjustment. I've now taken my basal doses down by about a third on the back of the course.