Hello guys, here is my experience today:
Canada Entry:
At the toll officer verified our COPR and made us acknowledge by reading out aloud from a paper that basically said, 'I understand and agree to 14 day quarantine'. Before acknowledging I told him that I plan on returning back to USA today, to which he said, 'I understand, you can go back but you still have to acknowledge'. Then he sent us inside the CBSA building where another officer verified docs, he also asked us Proof of funds, took signature and said we can't apply for PR card today since I'm going back to US and gave us a form and asked us to apply whenever we have Canadian Address. Finally another officer asked us to fill out Goods to Follow form and said whenever I plan on getting those items inside Canada they will verify from this list. Overall I felt that couple of officers were confused why I'm going back to USA when my clock starts today for PR but when I explained that my one time visa expires in august and I will be making final move to Canada very soon they understood. I would suggest download and fill out BSF 186 and BSF 186A forms before hand that might save some time.
USA Entry:
My wife and I have valid visa on our passports (mine expires April 2021, wife's expires on Sept 2020). It literally took us less than a min at USA toll, officer asked Citizenship, why and when did u go to Canada, where are you going to in USA and took passports and did his thing on computer and let us go in a minute.
Hope this info is helpful, let me know if you have any questions.