I did mine last month as well, it is casual and I was really prepared to avoid RQ, especially that I traveled a lot since I became PR, about 37 times,
I handed him of a detailed sheet of my travels dates, reasons and destinations. and gave him more details explaining each trip as a gesture of goodwill as I thought they love to see that.
Some of my friends put copies of their T4's as well, also I was holding my backpack which was full of documents and supporting documents, letters and printed emails from my employers, I was prepared in case for RQ, so I took everything with me (Rent contracts, my bank statements, car contract, medical bills, phone bills) the officer saw that I was prepared, I answered his few questions with honestly offering the supported documents he always rejected to see them.
hope this is useful good luck
Tito