Originally Posted by PVDProf
I just ran across this on a booking, too. What are the drawbacks of booking the US codeshare on UA metal? Do I give up upgrade priority, lifetime miles, or E+ (since maybe now I'm just *Gold, though 1P)?
You can put your MP# in and keep E+. Upgrades are supposed to be
at-the-gate space available only, but others have reported success
getting on and clearing off the regular list. You supposedly give up
lifetime miles, but in my experience you get them.