mine works perfectly. I am set to only upgrade to comfort plus IF its an aisle or window. When there is only a comfort center open, the GA always pages me and confirms i don't want it which i appreciate. The only time i pull myself off the list at the gate is if all that is open in first is row 1. I hate bulkheads(want to stretch a little and have my backpack available under the seat) so if I have a good comfort seat I will tell the agent not to upgrade me to row 1. They usually chuckle and then say " i get it". yes I am weird.