Just make sure you get the theory book and go through the whole lot and youll be fine! Its the hazard perception where many people slip up. It sounds daft but you can actually be 'too' aware like i was on the practice runs. I actually clicked as soon as i saw the hazard and it didnt register, so i found that if you double click the moment you see it, you get the full marks. Some of them are pretty tricky though so you definatly need to do a few practice runs to familiarise yourself with how it actually works.