Hey I have tried 10+ times to upgrade with miles (12,500 one way) and I have not been able to do this due to "not available" I even had a one flight showing two seat in first class used and the rest (16 or so) were "wide open" and I get the same pitch from the Delta Person on the phone, I asked "why not" and I got a reply of "not available" and then asked her to look at the flight and she said "oh my, I don't know why but that is what it tells me when I try to enter a miles upgrade." I asked "Have you ever upgraded someone to first class with miles?" And she gave me a very honest answer, she said "Not in a very long time." So I ask has! Has anyone here done this with success recently?