We just got back from Aulani.
Got our covid testing at Walgreens (need to check website frequently to get the testing time slot you want) which was easy and self-administered in our car. Results receved via email in 2 hours....except MINE!
For some reason mine didn't result, and I had to call the lab (Walgreens forwarded me to the actual lab) and even though my result was negative, my email somehow got missed. I was in a little panic as it was <24 hours until our flight and finally got the email re-sent to me.
QR code and app was fine, and we had to show the QR code in our app several times when we arrived in HI. We had to show the QR code again when checking into the Aulani resort. Then we forgot about the app and never used it again.
I cannot wait until we no longer need to do this (hopefully).