With me I have the most problems with the hotels. I constantly have missing posts with Marriott and Starwood. Come to think of it I don't think a Starwood has ever posted without a phone call.

Used to have a lot of problems with Hilton, but in the past year they all post VERY quickly.

I find Southwest to be the most problem free. One time I had a problem, called them and they saw it on the computer and immediately credited it. It was two flights that were point to point and they must have thought it was a connection.

I signed up for a bunch of promotions from Northwest and they all have posted, also quickly.

I tend to have problems with United posting promotions, and it usually takes a phone call to get it posted.

American no real problems, also no problems with USAir, even though they had to change my account number "to better serve me" recently.