I prefer the Amex card especially when I have purchases from merchants I don't know of. Why? Because if there is a problem, they will freeze the charge.

I had a problem with a starter and wanted to have it exchanged. Store gave me hell. Went home and talked to Amex.

Agent: We will file a dispute AFTER you return the item
Me: Store won't take it back.
Agent: We don't care. Put it on his table and if you have someone else see it, it would be better but just put it on his table.
Me: And if he doesn't accept it?
Agent: That's our problem.

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow