UA 1K traveling on CO 5/26 and 5/29.
Was able to select $39 upgrades for my boss and me in a CO 737 50, and a $79 upgrade for me transcon on a CO 757-200 into an exit row reclining.
I have a lot of useless observations, biased opinions (could they be otherwise?) and impractical comparisons about my first 4 flights on CO metal, may share them as others offer theirs.
But I wouldn't write CO off entirely, and certainly hope for the best if/when a merger happens.