Howdy.

I flew from LAX to EWR via DET on outbound and via MEM on return for a total of 4 segments 8/10 - 8/14. I am a CO Silver Elite and I was upgraded on all but the DET-EWR route. I found it easier to obtain an EUA on NW, however; IMHO, the CO First product (meal service, newer planes, newer/nicer interior, etc) is much nicer than NW. NW First isn't bad at all, but compared to CO, I did notice a difference.

Enjoy your trip and good luck on your EUA's!