DescentBB

I'm thinking of getting one of these frequent flyer credit cards, and paying all of my business expenses (15,000+ a month) with the card. Anyone have any experience with these cards? Is it worth it? I'm looking at them now, they sound good, but I don't want to get caught up in red tape and do's and dont's when it comes time to fly.What about other benefit cards, any I should know of?

I know that capital one advertizes fewer blackout dates. The only reason I don't have one personally have one is because of the yearly fee.