We did our landing on Saturday at the Rainbow Bridge in Niagara Falls. Because Aussies are visa exempt and had a visa waiver in place, we decided it was easier to cross over to the US and see the falls from that side rather than flag-pole. When you flag pole you'll get directed to the US customs where you'll have to wait to see an agent to get a form saying you were not permitted to enter the US and then they direct you back to Canada.
We were admitted, spent maybe an hour walking through the park on the US side before driving back over. The process on the Canadian side was dead easy. Told the agent at the booth we were landing for PR, directed to park and head inside where some forms were filled in by the agent inside, the Working holiday visa was removed from the passport and the PR visa was stapled in (it's a huge legal size sheet folded up). Then the agent went through the next steps (health card, new SIN, waiting time for PR card and how long to wait before citizenship). All in took about 15min. Apparently it's 6-8 weeks for the PR card, and you can't leave the country (unless there is an emergency) in that time period.
Best of luck to everyone else. I can tell you it feels amazing once it's all over.