Thank you very much for all of your replies, and CameraGuy who gave me an outstanding answer to all of my questions - Thanks!

I am going to start looking at the routes out of ORD and MDW and see how the availibility of F seats are.

One thing I have noticed between looking at posts on this board and talking to colleagues is that CO's service is probably one of the best of the big doemstic carriers. That is very attractive - compelling enough to start over with them.

Thanks again for all your help.

Perhaps when my wife and I make the switch we can meet up with some of you and buy all of you a few rounds of drinks.

Rico

BTW - Does CO treat upgrades with miles the same way it does as any other upgrade. To clarify, would it make any difference (or is it even possible) if I used miles to upgrade at the time of reservation, or do I still have to wait for the specified time period?