For starters, I would necessarily say that iTute produces the
best Exams. They do, however, produce Exams which commonly have rather difficult questions - comparative to most companies - which give those students who have a really good grasp of the content and a thirst for physics knowledge an avenue to really test their skills. Yes, the Exams do occasionally go outside the syllabus of the course (but only marginally), but If you feel comfortable with your knowledge and are performing exceedingly well in all the other practice Exams you have attempted then you might want to attempt some of the iTute Exams, but chances are the questions you attempt won't have much (if any correlation) to the real one you do in a weeks time.
Personally, I didn't do them because;
1. I was worried I would come across something I didn't know and would lull my self into a sense of insecurity (despite the chances of the question ever appearing on a VCAA Exam being practically none)
2. I wanted to take more time in consolidating my knowledge by putting time into reading notes and then undertaking questions which would be more relevant to the ones I would come across, rather than "wasting" my time on impractical questions
In the end, it's really subjective and a personal choice, I'm sure you'll do fine next week despite what you choose
