Definitely a YMMV topic. When the pri tags 1st appeared they were true jokes. Almost a jinx. Lately, I've got to admit somehow it seems to work a bit. My best luck is on intl flts.

Had a bad experience 1 yr ago where UX decided to leave a few bags due to wt restrictions. V disappointed they left pri bags when the belt was filled with non-pri bags upon arrival. Expressed my disappointment via 1Kall and got a $400 cert for my trouble...of course this was after a late delivery of the bags the next morning. Ugh....