I'm taking this exam. To be honest, Unit 1 seems rather straight-forward since Unit 2 builds on this and helps your exam technique. I think the only thing that troubles me at the moment is 'Breakeven Charts', the rest just requires learning the definition and having a go at some past questions.
Tip, in this exam knowledge and application are the most important things (worth over 50% of the whole paper). In Unit 2, Analysis and Evaluation are much more significant. So make sure you don't over analyse in Unit 1, nor overload on knowledge in Unit 2 without explaining in depth.