Man, I should have added that I was a starving pilot on my letter to Discover a few months back when I was trying to get a double charge from an Orlando park & fly lot refunded.It was over a year old so I really wasn't expecting much. I had just noticed it when I decided to go over my statements one day.
That being said, I'm pretty satisfied with my Discover card. I use it everywhere I can to build up the cash back, and pay it off every month so that I have cash back to begin with.
The only problem I have, like someone else mentioned, is that Discover is not accepted everywhere. This is especially true overseas. That was the only reason I kept a Mastercard account when I was still in the Navy.