Is it worth practising mocks now or after revision

I read on here that the focus for CFA level III should be on mocks. Just wondering whether its worth working on mocks NOW (as i finish each study session) as said here OR focus on these after i have completed the curriculum ie around May time. Any retakers or charterholders please comment?

Start now, but stick with the study sessions you’ve completed. Go back to the old exams as far as you can go and do the questions multiple times, working your written answers down to bullet points.

Thank you all for your advice. I have just completed Book 2:)

And I have started practising mock questions on getting familiar with the structure of the morning exams & I find this is totally worth it. Hopefully this pushes me to a pass.