I sat my CBE for F1 in May. I also noticed a lot of information missing in course notes and lectures for F1 on Opentuition i.e. I got a considerable number of questions on topics that weren’t even on the opentuition course notes. Moving onto F2 the notes are considerably better on Opentuition. This being said however I am of the opinion common sense really will allow you to pass F1, I didn’t find the exam that difficult.