Lucky enough to be upgraded to Polaris business on an upcoming flight from SFO to MEL with my partner.

after a lot of research we are debating on choosing between 7DF and 9DF for our flight.

seems like 9DF is nicer because it is in the cozier quieter rear cabin and has more space, but was turned off by some reviewers who had complained about lav noise/smell, especially in 9F which seems to have a straight shot view into the lav. Can anyone comment on the trade offs here? 7DF seems a bit safer but don’t want to miss out on the better seat! 11DF also an option. It’s an overnight flight so we will be sleeping quite a bit. We’re currently seated in 7DF.