Being based out of EWR, it has been nice benefiting from CO's second largest hub. I have really enjoyed seeing the build up of the European routes over the last 10+ years, some can be attributed to both men's regimes. Keep in mind that under Kellner's tenure we now have seen an great expansion of EWR-Asia markets (if my mental time line serves me right).
However, I have been concerned about the direction CO has been lead in over the past few years. Some of what I have found disheartening lately is now allowing the ultilization of the Q400's. (The ERJ's are far superior, IMHO.) But now we're seeing the Q400's on some of CO's premier short haul routes (EWR-BUF/Wash DC/ etc...). The other thing that has made me concerned for the better part of the decade is that CO has shunken to a primarily IAH and east airline. We've seen hubs (to one level or another) at LAX and DIA (now DEN) disappear in the 90's with nothiing coming into replace them since. And, there seems to have no attempts at it either. However, to Kellner's benefit, he has created a fantastically close alliance with UA. This now solves the problem of wanting to do an intra-West Coast intinerary for a pax who is wants to stick to a CO friendly enviroment. I know this requires flying on UA equiptment with their staff but to me, it's satisfactory.
Here's hoping that we can see better days for CO and the airline industry as a whole in the near future.
BTW, I know we all maybe getting used to Jeff Smisek coming in rather soon and are eagerly await to see what he will take this ship. Just out of curiosity, I would love to know how he will be dealing with DL now that they have both quickly swallowed up NW and are in CO's former but now competing alliance.