I've actually had very good experience overall with American Express. I highly recommend using their corporate cards for important purchases where you might wan

I've actually had very good experience overall with American Express. I highly recommend using their corporate cards for important purchases where you might want to extend your warranty. I've saved thousands of dollars thanks to that program alone. They also issue cash back rebates to your account every February. Of course, this is all provided that you always pay off your balance on-time.