At the end of the day there have been many that have travelled on QF booked flights with CI over the years and it all just seems to work. Officially CI need a first, middle (if applicable) and family name to be on the booking exactly as per your passport and that is what the call center agents will tell you. The call center agents read from scripts and have no idea what actually happens at check-in. Check-in staff just fix any outstanding issues and you are given a boarding pass. On my flight a week or so back QK checked me in and issued a BP, CI did not like it and reissued a CI BP at the gate. The CI BP had only half my middle name and did not match my passport, it did not stop me from boarding or cause any issues on arrival. From memory we went from doors opening to landside in 10-15 minutes and most of that was the walk to immigration. I have flown on a few CN carriers and CI would have to be up there with one of the easists.